I would say the main issue is that these people have very bad self esteem problems coupled with being introverts and the modern online worlds ability to endless

I would say the main issue is that these people have very bad self esteem problems coupled with being introverts and the modern online worlds ability to endlessly distract you. In the past, pre-internet most of these people couldn't live like this, they'd be forced out of their homes from boredom, but with the internet that's just no longer true. The only way to fix it is to fix peoples self esteem, but these are likely the last people in the world who'd willingly go to something like therapy, I can't imagine subsidies are really going to help.