i don't see how the fact he smokes pot contributes to anything in any way apart from the smell.
protip: marijuana doesn't automatically make anyone who smokes it a lazy bum with no future who will sit in basements and eat food, that's the dumbass stereotype the movie/tv industry and anti-drug propoganda has created. people can be just as productive, or more so, high than when sober. it's non-addictive, physically impossible to overdose on, doesn't kill brain cells, doesn't cause cancer, etc, it's a much better recreational substance to use than alcohol or anything else will ever be.
some people abuse it, yes, they use is excessively and don't do anything productive. don't blame the drug, that's silly, they would sit around and do nothing if there was pot in the picture or not. moderation is key, not just in drug use but in everything.