In general, it really does reduce the prevalence of something to ban it or nearly so. To take examples that both the American left and right hate to think about:
- Banning abortion really does make it harder to get one.
- Banning handgun sales really do make those harder to get as well.
(And yes, I am using the word "ban" as shorthand for "extremely tight/onerous regulations in red and blue states, respectively".)
(And yes, I am using the word "ban" as shorthand for "extremely tight/onerous regulations in red and blue states, respectively".)