Take cannabis prohibition. What a horrible injustice, the absolutely shameful negative propaganda still rings in the ears of many today.
I’ve seen it work, on sick children. Not just one, numerous. Often the results are so vastly superior to the cocktail of shit they get prescribed, (side effects of epileptic medications) it’s impossible to view cannabis prohibition as anything other than a disgusting scam.
It can be used to treat many ailments, safe and effectively, it should also be very cheap and accessible. It’s not though, and I suspect the ultimate reason is $$