So making the homeless take food, shelter, life skills/technical training and making them stay sober because they can't seem to figure it out on their own in a centralized location is wrong because other people abused the system before?

That's exactly why we have literal crazy people everywhere now, the aclu pushed for the deregulation of the mental asylum system till it happened in 1976, because the aclu decided it would be better to have no mental healthcare for anyone beyond private, than to install checks and balances in the mental health asylum system where abuse had occurred.