The effect is also stronger, lasts longer, and is less addictive than coffee. The average user isn't smoking a joint per hour like it was tobacco. Sure, it's definitely not healthy, but everyone does something that trades longevity for fun. :-)
I like both. When I want a quick&easy buzz before sleep, a smoke or vape is the option. If I wanna get baked for a few hours and wake up feeling amazing, an edible it is.