Yes, you are a straw man. Alcohol worked because it’s different from ecstasy. Everyone could and did make it at home out of food. Can you make ecstasy at home out of regular food or does everyone do it regardless of law? No. The two are too different in circumstances and so can’t be placed in the same category.
Black markets exist because they’re profitable. The war on drugs was for money, racism was just the hook to get the investors on board.
Also, legality is dependent on the legalizers. Where corruption is rife and consequences nil, legality is worthless when it comes to quality control.