Yes, it's just as false as the ignorant notion that pot is a "dangerous threat". Anyone who thinks so is an utter moron and has no clue what they are talking about.
Unless you are a particularly impressive fellow, I dare say i've been derided by far better people than you, who ended up eating their words.
The dangers from Marijuana are numerous and varied. The primary danger is that it induces individuals to get in the recreational drug habit. Many of them go on to worse drugs and end up wrecking their lives and the lives of many around them, not to mention the fact that the rest of us end up paying for these welfare bums.
The stuff causes permanent brain damage in developing brains. The stuff has been linked to numerous psychotic breaks. (Columbine, Aurora, Gabby Giffords, etc.) The stuff has become "Soma" for the masses.
You do not see the drug as dangerous because you have a far too limited scope of the problem.