Are you drunk or just dense? You don't evaluate the safety, health implications of marijuana by looking at the safety, health implications of alcohol. Makes no sense. Can't say it any simpler for you.
And yes, they are completely unrelated substances.
No, they are related in that both are substances used by folks recreationally to attain a state of altered consciousness.
C'mon, BB, why do you think folks compare them so often if they're "totally unrelated"? lol
So you seem really good at making declarative statements about your beliefs but I don't see you explaining your rationale for why, when deciding whether a given behavior is legal, you think that considering similar legal behaviors makes no sense.
Realize, of course, that I'm not saying that's the ONLY factor to consider, but I am saying it's an important one.