Again, you might have red wine with beef, white wine with dessert, but you have pot to get a buzz and thats about it.
You keep making this case, but the truth of the matter is that it's nothing more than proof by assertion from a position of blind ignorance of the subject. You're saying that something is impossible and when multiple people stand up to say that it is not only possible, but something they do on a semi-regular basis, you reply with essentially "nuh-uh!".
A regular smoker or drinker can tell the instant when 'totally sober' changes to 'starting to feel something'. One hit isn't going to do that (unless you want it to, in which case you hit a larger pipe). You can nurse a pipe for hours without feeling anything if you so choose, sticking your fingers in your ears and insisting you can't won't change that.
Tolerance for pot is different than tolerance for alcohol. A lightweight will drink 2 beers and be buzzing whereas a heavyweight can drink much more before feeling any effects. With pot, smoking a joint will get you high regardless of whether it's your first ever or if you've been smoking by the pound for decades. The tolerance (like the 'addiction') is more mental, you learn what to expect and learn to handle yourself better under the influence. You also learn to recognize the nuances of different strains better and can appreciate the differences more, this is the 'reverse tolerance' mentioned earlier, an experienced smoker will notice the subtleties of that type better than a rookie and will naturally then feel them more since they're paid proper attention.
Trust me, i hang out with botanists; the modern day "super-weed" you speak of is the excess we sell (legally) to medicinal centers so that we can keep the good stuff for ourselves. Even with all that potency, it takes some time to get started, and you can control that by rate of intake, just like all the other drugs.
There are only three relevant facts when discussing legalizing marijuana:
Great numbers of people have been and will continue to use it regardless of the legality or health issues.
At the moment criminals make gobs of money from that use and kill hundreds to keep those profits.
Billions of dollars spent on the War on Drugs over 30 years have failed to change either of the above.
None of the rest of it matters at all. My solution:
Legalize it
Tax it mightily
Find more productive work for the DEA
↑ This really says all that needs to be said on the subject ↑