"Marijuana destroys personal ambition, productivity and self-esteem."It would be very eye opening if you could build a case for this being so, apart from saying that's been the case in your experience and that of your friends/acquaintances.
Have there been any research showing this is the case? If so, how large/good are those studies? What's the scientific consensus on this issue?
As far as I know there's very little research in this area, so most of what we have to go on are anecdotes.
"Marijuana is addicting even though people say its not. It is much easier to quit than Tobacco, but denying that its not addicting is not true in my experience."
But many other things are addictive in the same way -- like food, sex, sports, video games, etc... and addiction to any of those could lead to very severe consequences. Would you say it's time to make food, sex, sports, or video games uncool?
I'm also wondering why we should be focusing on cannabis when alcohol is way, way worse, and whose use is far more widespread.
"Marijuana is a nuisance on streets, apartments, etc. It has such a potent smell, it is impossible to get rid of. I would say it has 100x power of smell than perfumes, probably even more. You can smell Marijuana in your car if someone on the road is smoking it."
I like the smell of most cannabis strains, though some are unpleasant. Tobacco smell is way worse for me. Also, when vaping there's almost no smell at all. In any case, I hope there is social pressure not to smoke indoors where people who don't like the smell might be present, like on subways. That's pretty rude.
"Lung damage, it's undeniable."
You can eat it, and when smoking it you could run it through water to take out some of the impurities and/or vape it, which helps too.
"Marijuana is a gateway drug"
Not sure what to say to this. Some people are going to experiment with drugs. If they don't start with cannabis they'll start with something else, whether alcohol (which is way worse), some "bath salts" (which are usually some random novel designer drugs of unknown toxicity or known to be more toxic) or whatever. You're not going to keep these people from experimenting by making pot "uncool".