So legalize it and put money into treating addictions and mental illnesses. This isn’t very hard.

Of course. But look around you. Our governments won't do that, and no political party that could make it to power is pushing a platform like that. I'm more than happy to make kids playgrounds out of concrete if I knew that bandages were free.

Most if not all cases. Cannabis is objectively less dangerous in practically every way.

I agree. But it's not like Alcohol usage will go down once Cannabis is legalized. If anything, people will use them together in a vicious cycle. Throwing baseball bats into a dangerous hockey arena is never a good idea, even if the bats are made of foam.

And alcohol’s effects aren’t?

Alcohol's effects are immediately visible. It's hard to be an alcoholic and still look at yourself in the mirror happily the next morning. Weed has no such negative phenotype, if anything you will look happier the next morning for abusing it.