Getting back to the original thread, my brother smoked and ate Cannabis for over 30 years.
He also indulged in plenty of other drugs too.
That was the death of him.

It's a tough call, and it might just be a biased view, but I feel that his strong inclination to get involved with cannabis did encourage him into other drugs.
I did see his personality change.
Maybe he was easily influenced and would have changed anyway, I don't know.
Maybe his personality,character and behaviour was always going to change the way it did. I don't know.

I do know his story, and it changed me too.