> You can’t seriously compare smoking and keeping up with friends and family
You're right: It's easy to smoke outside without harming anyone but yourself -- and even if you smoke indoors, you only harm one room full of people at a time.
No doubt that smoking is way worse than using Facebook. But using Facebook (and similar sites) can cause mental health issues which should be taken seriously.
You must come from a nice family.
Some people don't. Some people are actively in hiding from their families and things like that.
Some schizophrenics go to in-patient treatment, get better, go home to their nutty relatives and get worse again. This is a known thing.