Seriously do you realize how idiotic your statement is? Of course people are invested in their own lives. They use Facebook to share things with their friends and family just like they used to do with snailmail letters then telegrams and then phonecalls and then with e-mail and now with Facebook.
Facebook is just the next step, nothing more. There have always been nattering nabobs down through history like yourself poopooing each of the advances in communications. I would even bet you have long dead ancestors in Europe who liked to chuck their wooden shoes at infernal machines that scared them.
Further, I want you to know you are certainly entertaining. You've provided many belly laughs to me and a few friends who I share your responses with.
This is what I use FB for. I have family and friends who live out of state and many miles away from me and I enjoy seeing pictures and video clips that they share with their family and friends. I agree that some people post TMI or inane stupid stuff on FB but I can easily ignore that just as I do the email chain letters my SIL feels she has to send me a couple of times a week.. And I’ve gotten back in touch with two old friends, one from high school who I lost track of many years ago and am so glad I did. I’ve also gotten “friend” requests from two people I’d much rather not communicate with anymore and easily ignored them. I also “unfreinded” a teenaged great nephew whose posts were riddled with obscenities and drug use references and I let him and his parents know exactly why I did so.
FB, just like any other electronic media or even old school media like snail mail, post cards, telephone calls, is all in how you use it or choose not use it.
No, this is an advancement in narcissism.
Stop deluding yourself.