Not sure who you're addressing here?

As for it not being bad to smoke grass... maybe get better informed?
It affects the brain which is a big problem, certainly with youngsters using it a lot as their brain hasn't fully developed yet.
Another thing is that most of the available marijuana has gotten much stronger than the original stuff that hippies probably smoked in the 60s.
It's supposed to be a soft drugs, but some types blow your head off.

The only safe product derived from cannabis is CBD oil which is used a lot for health purposes. But the THC levels that make you high are very low in it. They do need a certain amount though if you want health benefits from it.