Clearly you do not understand: 1) how addictions work, 2) how mental illnesses that aren't addiction work, or 3) that almost no one chooses to be homeless but people do fuck up.
There is no excuse to dehumanize anyone and if you've got yourself convinced that these people somehow got themselves where they are then you've fallen for the capitalist propaganda cause guess what? People who are happy, stable, and well provided for do not generally start doing drugs and people with good mental health support do not typically just stop taking their meds, but people who are comfortable with the status quo will make any excuse to make sure they get to keep what they have while ignoring that everyone has a right to that same comfort but some people need extra help getting there.
I'm obliged to point out the recent Doctor Who episode where the aliens were owls. Well, shape shifting, cosplaying owls to be more accurate.