why don't Judges order people who're arrested for drug use in Texas to relocate to states that currently permit recreational drug use?

I don't think most Americans could afford to move, even if this was a good idea. Splitting drug addicts or even recreational users from their families and dumping them in a new state seems insane to me.

local gangs

I don't know how much local gangs are involved in Texas. Back in the day you were never that many steps away from getting your drugs from the cartels, if you're buying the stuff they're moving.

Now people often just drive to Colorado to buy weed to sell here. Better than the cartels, but still miffs me we're pissing away billions in revenue.