No worries I did not feel attacked. I certainly am aware of how drugs have been used in the past and especially how their criminalization was used to oppress people.

I still think that even in a socialist society people would use drugs because it's fun. I would hope that as you mention in such a society abuse would happen way less due to not needing it as a way to cope with our shitty lives. Criminalization imho would not solve an issue but create stigma around using while not actually stopping people from using them.

I think forbidding use usually creates more dangerous way of people using them. (e.g. Consuming more at once and using drugs that might be cut with shit)

I have no idea what's China policy on drugs, are users thrown in jail like in most countries ? I don't think that because something was used by a colonialist state to fuck up a population it should be banned (even though I can empathize with the trauma around it). I feel it's like currently LGBT rights are pink washed by neo colonialist states to try to justify why they do fucked up things in some countries does not justify these countries then oppressing LGBT communities to get back at the colons(even worse when most of the anti LGBT laws were initially created by these same colons in the past centuries).

What is China's position on alcohol and cigarettes? These are usually example of drugs that are legal and not stigmatized (despite having a high risk of abuse)