I never said I was taking anything nor did I claim to be better at "handling my substances" than anyone else as you seem to imply by your driving analogy. It's anecdotal because this is a single personal account a friend and not a scientifically significant subset of the general population or a representation of much of anything at all except for that specific person's issues.
I mean, maybe the laws are there to protect, but quite honestly i don't know what your friends taking, but the laws protecting people from pot are hardly justified given that it's a hell of a lot less dangerous than the legal alternatives like cigarettes or alcohol. Further perpetuating misinformation about the effects of drugs is not going to help this any. I reckon even the "weak or poorly insighted" are not going to be so much more blinded by pot than those with some super-human substance-intaking abilities that you seem to imply exist...Sure you might see the person who's a "n00b" at it act all silly or what not, but the placebo effect is a powerful thing.
Ever seen those scientific studies where they give people "alcohol-free" beer and don't tell them, and then watch as the people proceed to talk louder and act stupid even though no alcohol was actually involved?
Fact is, people are dumb all by themselves, blaming the drugs is just an excuse...and if that person's use of drugs is making then even more dumb, then it's just an extension of that person's inherit stupidity.