That sounds a lot to me like a bunch of New Age "woo" – that your cells have "intelligence" and "healing knowledge".
For example, if you break a bone, the "doctors and science" will only bring together and align the broken bones, but the actual healing which will fuse the fragments into a single functional bone again is done in the subsequent weeks and months by your own cells. That's where the bulk of the healing is done.
And if a doctor doesn't set the bone properly, the patient could be crippled for life. Also some breaks, compound fractures, require surgery, and sometimes plates or screws are necessary to properly align the bones. Not all broken bones are a simple matter of bringing together and aligning them and letting them heal on their own.
For majority of chronic diseases which are not as simple and with self-evident solution such as bringing together the broken bone segments, the entire healing is done by your own cells.
Not always. Sometimes medical intervention is absolutely necessary.
About a year ago, while at his son's house for Thanksgiving, my older brother started having severe pain in his right hand. Then his ring finger turned very hot and red and became very inflamed, and then the redness and pain started moving up his hand and into his lower arm.
When he went home the next day he went to the doctor's and his doctor immediately sent him to the hospital and he was promptly admitted and put under the care of an infectious disease specialist and put on IV antibiotics and underwent two surgeries to remove the dead and infected tissues that were necrotizing and on the verge of becoming gangrenous and a regime of debriding the dead tissues and sterile whirlpool treatments and keeping the wound open and draining so it could heal from the inside out with the help of antibotics.
But the initial concern was not only that he could lose his finger, that it might have to be amputated and he came very close to that happening, but that if the infection would spread, that he might also lose his entire hand or the use of it or that the infection could spread to his entire body and to his heart which would be fatal.
The diagnosis was severe Cellulitis - a severe bacterial infection of the subcutaneous skin and surrounding tissues and one that was worsening rapidly. While they were not 100% sure, but as my brother had been clearing wood and leaves on his property a few days earlier and not wearing work gloves, and in an area were Brown Recluse spiders are well known, they believed the infection came from a spider bite, several of his nurses told him that it looked very much like what they'd seen before from Brown Recluse spider bites especially that his whole finger turned black.
My brother spent nearly a month in the hospital. Certainly no fun for him but he kept his finger, although the tissue, muscle and tendon and nerve damage from the infection is permanent and it will forever be crooked, he kept it and his hand and most importantly, he lived.
But if he hadn't gone to the doctor's, or if his doctor had not recognizing the seriousness of the situation and him not getting my brother immediate and excellent medical care, it wouldn't have healed on its own "by the intelligence and healing knowledge built in his own cells" and he might have died from this infection.
Before modern medicine, people used to die from simple infections, even from tooth abscesses. Thank God for giving us humans the wisdom and tools to develop modern medicine. It is a gift.
It's a plain modern science. The sophistication, elegance and complexity of cellular nano-technology for molecular scale bio-engineering is far beyond anything human technology could match. This is becoming increasingly more evident with every new advance in cellular biology, molecular biology and biochemistry.
A single cell in your little toe knows more about engineering new live cell from scratch (from simple molecules used for food) than all the human scientists and their technology put together. You could create an all star team of molecular & cell biologists, biochemists and all other leading scientists of your choice, and give the task of synthesizing a single new live cell from scratch (from simple molecules) and they wouldn't even know how to build one live organelle, a small organ of cell, let tens of thousands of such organelles organized into a live cell, to say nothing of synthesizing trillions of such cells into an live organism. Yet, the biochemical networks of your cells have achieved such feat of biochemistry, of synthesizing new live cells from scratch, thousands of times while you were reading this post.
About a year ago, while at his son's house for Thanksgiving, my older brother started having severe pain in his right hand. Then his ring finger turned very hot and red and became very inflamed, and then the redness and pain started moving up his hand and into his lower arm.
That's correct for acute problems with a single, simple direct cause that can be resolved fully via well established methods. That covers minority of diseases dealt with by the sickness industry, chiefly the trauma treatment via surgery and acute infections via antibiotics. Such treatment cure or eliminate the underlying cause of the problem.
Unfortunately, for almost everything else, the objective of the sickness industry is "disease management", a euphemism for masking the symptoms without addressing, much less eliminating, the real cause of the diseases (which is often not known).
That approach is like "managing" your credit card debts by throwing away the unopened warning letters from the bank and silencing the phone ringer to "manage" calls from debt collectors. It may help your comfort on a short run, but you will be a lot worse off when the process hits its natural limits.
The net outcome of the prevailing "disease management" approach, which I have seen unfold many times with family members and friends, are ever expanding series of drugs, each new drug "managing" the damaging side effects of the previous drugs (which are continued for "managing" the initial symptoms). It is a vicious circle optimized to keep you hooked to the sickness industry subscription model for the rest of your life.