Is that crazy is very very common. My mother for example was a high-functioning alcoholic and that was largely due to tons of undiagnosed mental illnesses. I myself probably should have been in a variety of programs to deal with various forms of ADHD and light autism but my mother being a bit of a loon chose to move us to another district where the school didn't have the resources to do all that. And most of my friends and family exhibit some form of obvious mental illnesses.
Basically in America we don't like to acknowledge mental illness unless it's the kind that makes you violent or suicidal.
There's an old phrase, I cut myself to feel alive. I've never been that far gone but I know people who have and they explain to me what it actually means.
Crazy people aren't crazy 24/7 or even 365 days a year. They go through bouts of insanity and conversely they go through bouts of sanity.
And crazy people can often feel the attacks coming on. Much of this is due to brain chemistry issues.
So if you feel an attack coming on and you know that you're going to be suicidal in the very near future but you know you're not going to want to actually kill yourself after the attack then what you need is somebody to watch you 24/7 so you don't kill yourself.
But at least in America we're not going to pay for that and anyone who cares enough about you to do that sooner or later has to sleep or go to work or both. They just can't watch you around the clock.
So what you do is you want to get admitted to a hospital to be watched but they won't do that unless you are actively harming yourself. So you cut yourself a few times and that gets you in long enough to hopefully get past the current attack.
This is an extreme case but a less extreme case is a buddy of mine with severe anxiety issues that prevent him from working a full-time job. He looks like a fully able-bodied person but he will periodically have freak outs and breakdowns and when you do that unless you are some sort of mathematical genius that can command high salaries, and sadly he is not, then you just keep getting fired from jobs.
That's the kind of crazy that is frustratingly common. In fact I'm willing to say quite a bit of the poverty that is generational can be traced back to crazy and other health problems preventing generational wealth from accumulating.
I don't know about the rest of the world but America is obsessed with hyper individualism though. It's a core part of our culture. So we don't like to talk about systemic problems like that and we like to pin everything on the individual and if they can't hack it well they can just be homeless and die in the street or we can round them up and toss them into work camps.