The problem is QS is in no position to attain power. I really hate to say that but it's true.
But what QS CAN do is push the issue and shame the government into chilling out (sorry for the pun) about cannabis. That doesn't look likely. The top 3 parties are a bunch of bozos. Each of them are having a temper tantrum over legal cannabis. I really believe Legault will use the nonwithstanding clause and block legal cannabis in Quebec,period. It wouldn't surprise me.
It's not like the feds are giving people the right to make bombs in their residence. I really wish we had a rational and progressive government in power. Sadly,it looks like we're going to end up with something worse than we already have.