On the street gang members might force you to pimp yourself or sell drugs, and use your addiction to meth or fentanyl or threats to your life as their hold over you. They might light your tent on fire with you in it.
https://slate.com/news-and-politics/2018/07/tent-fires-are-o...
For these people who have severe mental illness, free housing with assisted care on location looks a lot like a mental institution. Without oversight they are liable to walk out of care and be back on the street. For some homeless, that's how they are on the street today. They might have gotten a delusion that leads them from disappearing from their families, and sometimes they find them years later living on the streets in a state of complete dissociation with reality, other times they never find them.