There is use and there is abuse, it's quite different.
Alcohol is legal but we are constantly told to use it in moderation, some people don't and that causes problem.
Fast food is not harmful but if you eat lots of it every day that is not good for you. Same goes for fizzy drinks, sugar and just about every thing.
Sure if you are smoking cannabis from the time you wake up until you go to bed every day you will have problems, partly because the more you smoke the more you need to some to get the same high.
I know heaps of people who use it including well know high profile people. Myself 1 gram will last me 4 days, my alcohol consumption is more of a concern.
