I've thought of going full hermit before, but you have provided very good examples of why that might not be viable... People usually need good infrastructure and other people in order to not turn into blithering savages (no guarantees, but the odds are much better).
I guess for me, what tends to make things work pretty well much of the time is accepting that most of what has been unfortunate for me as an adult has been the result of my bad choices/ignorance... Nodding off in the school of hard knocks... That and having never really figured out what I want... Or if I even want anything...