If you give them money and they spend it on drugs, maybe it's because they still did not have enough money to believe they could live a normal life.

If they destroy an apartment given to them, maybe that apartment was cheaply made and not fit for humans in the first place. Maybe if it were worth caring about, they would care about it.

Mental health treatment ≠ addiction treatment

An addict is more likely to stop being an addict once their normal human needs are fulfilled.

A mentally ill person does not stop being mentally ill, unless a cure exists. Their symptoms can be mitigated or reduced at best.

Pay attention to my use of the words "maybe" and "more likely", these are not absolutes and that's most of my issue with your comment. If you give SOME of them money, they'll spend it on drugs. If you give Some of them an apartment, they will destroy it. Others however, might spend that money on an apartment and nice clothes to interview for jobs with.

These are all just my opinions. I am someone who has destroyed apartments, spent money inappropriately on drugs and alcohol, and did not care about anything for a decade unless it modified my state of consciousness. It took love and patience from a couple people and it wasn't easy for them. It took a couple years and wasn't cheap, but I think it worked and I am lucky to have those people make the effort. I believe it's a solution that should be attempted more. Giving someone money or an apartment is a short term fix that ignores the problems. Giving someone love and patience is a long term solution that difficult but has better odds the longer it is done. There's always exceptions though, some people are just fucked.