You have confused someone being able to convincingly walk down a certain line of logic for that person actually believing that line of logic. The author states

You have confused someone being able to convincingly walk down a certain line of logic for that person actually believing that line of logic. The author states one of many reasons right afterwards why he thinks that is a really bad idea: >Why, though, shouldn’t we just double-down on orthodox prohibitionist remedies? Because you wind up punishing a vastly larger number of innocent people, that’s why. [...] When you ban intoxicants, you conceivably reduce abuse, but you definitely end up punishing an enormous number of innocent hobbyists - as well as the professionals who supply them. I linked that page because, when I was an alcoholic, I was also an asshole to the people around me. I mooched off my parents, deeply worried my brothers, and refused to pull my own weight even a little bit in the household economy. But there are plenty of people who drink alcohol who are not assholes because of it. They should not be thrown under the bus because I personally become an asshole when exposed to the substance.