The tide is definitely turning on that, as many states are legalizing it.
I remember when I was young wondering why we couldn't just isolate THC and sell it legally in drinks, foods, pills, etc. That way you don't have to smoke it (health hazard/smells funky) and the government can tax it.
Well, decades later here we are. When my friend's dad was dying of cancer, he brought him some gummies. His dad was a God-fearing conservative man from the deep south, probably the last guy who'd blaze a bowl. But the gummies definitely relaxed him and eased the pain a little during a tough time. I think that's the kind of thing that will eventually normalize "weed." In the states where it's legal, you can get it in so many forms and levels of potency.
The other part of the stigma is that stoners for many years ruined weed for normal people. That is, you'd see these Deadheads and doofuses in their stupid hats and weed leaf t-shirts and hemp satchels and they talk like the biggest fukking idiots. It becomes this moronic lifestyle for them because it's all about defiance. But nobody ever thinks about the physician, or the financier, or the lawyer who might quietly unwind on a Friday night with a joint and some nice music.
And don't forget the military-industrial complex that gets a hard-on for these little narco wars because of drug laws that (duh) create a deadly black market. DEA jarheads that act like knocking over some central American drug lord = D-Day.
Finally, I remember Bill Maher saying in the 90s that companies like Pfizer don't want to compete with marijuana, because "they will LOSE." I'm sure they were lobbying against it for a long time, but attitudes changed.