CERN isn’t set up to “split atoms”.
More the reverse.
Today they warmed up by testing firing a proton beam around the collider in one direction.
They, they test-fired a proton beam the other direction.
The plan (to happen in a month or two): collide two proton beams head-first, directly into each other. Impacting the most dense particle we know of traveling at light speed, directly into another just like it traveling at light speed. Head on.
The resulting compression of matter, just might create a genuine black hole.
After which, it will be hungry.
Looking for food...
I don’t think you’re following the conversation. I didn’t say the LHC splits atoms.
In the early 80's, there was worry about the biotech industry unleashing havoc on the world. In reality, the nearly infinite number of living bacteria in the world are already doing massive experiments with random mutations which is in far excess of anything humans would create. And if there were a danger, it would be better to have it in a test tube first than to find it in the wild. It is better in the lab, because you know more about it and what to do about it.
The solar system is already doing the same experiment with proton proton collisions at nearly the speed of light that the collider is doing. If there is to be a mini black hole, I'd rather find it in the lab, instead of in the solar system because we might find out enough to deal with it in the lab.