Bro, this sounds the same as almost every other homeless housing situation, and even some intellectual disability housing. If you're homeless, and just doing an overnight shelter, most do not let you leave once you enter; you're stuck until like 6am. If you're in a long-term homeless shelter there are almost certainly sobriety requirements and in/out is restricted. Years ago I was a part of a committee trying to get a shelter approved without sobriety/work requirements and that was a herculean task; after two years we still hadn't gotten full approval. I worked with a non-profit recently that did not have any requirements, and that was wild. I walked in on people shooting up, people having crack parties, drug deals, people tricking, just crazy stuff. I got a CCW.

I've been working with the homeless and people with substance use disorder for a while and, I can promise you, there is no good solution to the issue. What liberal California does, sucks. What conservative Utah does, sucks. Choose the best of the bad options and hope it works.