Let me just say this: The scum that were attracted by legalization were scum before they were attracted.
It is legalization in enclaves, inevitable with state by state action, that creates these kinds of scum magnets.
The street idiots you describe were street idiots before, but they lived somewhere else before legalization. They were more evenly distributed.
If legalization was more common, they’d go back to their natural distribution.
You see a similar thing with gambling. Gambling addicts are more concentrated in areas where gambling is legal. But they were gambling addicts, anyway. (Not an exactly parallel argument, I admit, with the advent of internet gambling, but partially on-point. Hell, there’s always day-trading.)
Of course you completely overlook the effect of easily available drugs increasing use and users. Spreading the misery does not reduce the incidence in a given location. It takes up all available space.
And how about alcoholics? Where do they fit in your myopia? And let me tell you something bud, I’m a recovering alcoholic.