I think it would make a fascinating poli sci case study about why almost all cannabis legalization came from popular referendum instead of legislation. What is it about cannabis that makes it so much more amenable to direct democracy compared to representative democracy. Polls show that overwhelming majorities in most states support legalization. Yet elected representative have been extremely reticent to move policy…
So they put it up for referendum instead, so it happens but it doesn't harm anyone's careers.
It's not at all any kind of vindication of direct democracy. Rather, because it's broadly popular but also highly unpopular with significant segments of voters on both sides... a referendum works out for everyone.