This is an argument I have had on both sides. One side demonized it, the other said it could do no wrong.
No, weed is not a one way path to a death sentence as you become a raving Satanist! But it also isn't harmless and there are things to keep an eye on, just because it doesn't kill you doesn't mean it gets the all clear.
If you want to do it, go for it, but please be aware of the potential issues.