Dude just my personal experiences and those of my friends differ with yours. I'm not gonna pull studies to prove you wrong, this has already been covered and well established on this very site. If the data wasn't already here, then maybe I'd *consider* getting evidence, but I don't think evidence is needed to prove that smoking tons and tons of burnt plant matter is 'very minimal'. With a statement like that, the burden of proof is on your shoulders. Otherwise I'm quite comfortable just stating that you are wrong and don't feel I need to back myself up. (just remember, i'm NOT saying pot is *worse* than tobacco, as I've said before these studies come out every other day showing one is worse than the other. But the bottom line is that, regardless of which plant you're burning and filtering with your lungs, you do that way too much, and it's bad for your lungs. It's a pretty basic concept bro)
(also about pulling studies, we all know that methodology flaw, biases, etc kill the validity of these studies, so even if I spent time finding studies, verifying they looked as legit as possible, I can already see we'd be sitting here arguing over whose study has greater credibility. It wouldn't end. Unless you provide evidence to back such a radical statement as "yeah there might be damage from heavy smoking but it is VERY minimal", I think the concensus is enough to say you're wrong, w/o me having to find studies.)