I think you have this exactly right. They are mostly enforced against the poor and political enemies.
Relative to no war on drugs? Who knows.
Just a quick Google search g estimates that less than 3% of drugs are intercepted by the government.
I always wanted to try specific two, but first cannot be had in the safest form because of the specific precursor ban, and all of them suffer from an insane (to me) risk of adulteration.
In twenty minutes I could probably find 10 "reputable" shops/markets, but still with 0 guarantee I won't get the specific thing laced with something for strength.
Even if I wanted pot (I don't, I found it repetitive and extremely boring, except for one experience), I would have to grow it myself (stench!) but then.... where I find sane seeds (healthy ratio CBD to THC)?
Similarly, I wouldn't buy the moonshine from someone risking prosecution to make and sell it. It's guaranteed this risk is offset.
So ... I can't get what I want because there's extremely high chance of getting hurt. An example being poisoning with pills sold as mdma - every music festival, multiple people hurt. Not by Molly, by additives.