Most things have a genetic component. Blame doesn't disappear because someone was more predisposed towards something. For instance, men are generally more predisposed to violence than women. Any sane person would agree there is a likely a genetic component to this fact. But if a man beats his wife, we still can and should blame him, even if it were true that with different genetics he would not have beaten his wife. (or more realistically, with different genetics he would have likely never married the same woman.)
I think we are in agreement here. What I was responding to was your seemingly lack of interest in solutions only commenting about still being able to blame folks for decisions they made whereas I think if we are going to spend we should spend to take folks off the streets and get them help or further remove what is seen as a blight to an otherwise beautiful city.
The streets and parks and business fronts are not camping areas.
It sounds like we agree more than I originally understood. I do care about treatment, and despite what my comment might have suggested, I think blame should be wholly separate from punishment or remediation. I don't care particularly if we spend a lot of time blaming drug addicts, only if we get the streets cleaned up, and their lives improved.