Still you're missing the elephant in the room Corey.
You just named two of the biggest issues we have as a society.
Smoking and drinking.
Have a look at the social and economical impact of drinking and smoking you see why it isn't a good argument.
Saying "drinking is legal, why can't MDMA be" isn't a valid argument. At all.
Why would we as a country, when the government is trying so hard to minimise the impact of drinking in multiple ways, look at going backwards?
Why should taxpayers have to fit the bill?