Indeed, allowing this to occur has wrought orders of magnitude more death and destruction than sports gambling or drug use or prostitution.
no victim == no crime
It would have a positive effect if I went around summarily executing everyone accused of child exploitation, for example, but it would be insane and unjust. There’s a reason we don’t do it that way.
Threatening people with violence for what other people view as misapplication of their own resources is incredibly unjust.
If you don’t have the freedom to destroy yourself or your own resources, you don’t have freedom.
It isn’t the legal system that causes this wreckage (although you might disagree, “lifting” a ban isn’t an action - it’s cessation of the threat of future enforcement action), and it isn’t the legal system that is the appropriate solution to the problem. All bans are, practically, are the threat of someone pulling out a gun to force you to stop. If you personally aren’t willing to go to that length, you shouldn’t vote for or support such policies.
Are you willing to pull a gun on an addict to stop them from indulging in their addiction? If not, what possible moral justification do you have for instructing a cop to do same?