You don't even need to go that deep. Does tobacco hurt others? Except for smokers costing the state more on average, which should never be a crime by itself, not really. I don't like cigarette smoke and think we should take obnoxious smells more seriously, but the logical conclusion is not banning tobacco use.
Agreed. The idea that the 'concept of banning' is a rabbit hole should not prevent actually talking about the concepts. To say something should be banned with such unsubstantiated arguments and complete disregard to the actual outcome is ridiculous.