I have no problem with cannabis researched and prescribed for medicinal use.
But the leaves we used to chill on once upon a time have been bred and hybridised into some real mind bending stuff. Not all cannabis is the same.
While some may be able to handle it, for many, and certainly for those pre-disposed to mental conditions.......it
can do their heads in

.
I ask my kids not to smoke cannabis and on that basis, abstain myself.