Interestingly, I have never taken ANY of those drugs.
More power to you. I don't advocate that anyone should, just that those who do should not be subjected to idiotic and disproportionate sanctions simply for doing something they enjoy.
I don't consider the sanctions idiotic and disproportionate and you wouldn't either, if your kid was killed by a driver, high on weed who loses attention and jumps the curb and pins your kid to a fence.
Lots of people "enjoy" doing things that are illegal, serial killers for example! Enjoyment is irrelevant.