I believe it isn't really the people; it's the mental illness or addiction that keeps them from accepting help. Every chronically homeless person I've met is one, the other, or both. While I understand it's tempting to think that we should let them decide whether to accept help or not, I don't think that worldview takes into account that you're talking about people that are actually incapable of making decisions in their own best interests. I personally think it's inhumane that they are not taken into protective custody and allowed to live in dignity.