Oxygen's a pretty potent carcinogen, yet I really enjoy breathing. Makes me feel alive.

I was mostly being provocative. Reality is that OP seems to be quite narrow minded and has made some enormous assumptions about people who smoke cannabis.

In very general terms, the world would be infinitely better off if people did not cast such wide nets on their assumptions.

I feel like we've all accidentally dabbled in self-harm enough to make up our minds on it. I've stubbed my toe and wacked my elbow on enough sharp objects to know it's not for me.

Wow, the best exmple you could find is self-harm? How about rock-climbing that can also be very dangerous if not practiced safely?

It's true. Everything is literally the same, and nothing ever happens.