I absolutely think so. It not only opens your eyes but also makes other options more available to you. Very few drug dealers only sell one thing, and will often cut deals if you buy more than one "product". I used to go to one guy for coke, weed, and pills. He started out as just my weed dealer, but through smoking weed and hearing people talk about how great coke and Percocet were, I decided I wanted to try them. Legalizing weed and making it readily available in dispensaries cuts this part of the equation out. You're not gonna get offered a free sample of heroin at a dispensary lol. I denied it for a long time, but it most definitely is a gateway drug.