That depends on the implementation, though, doesn’t it? After all, in the Netherlands, it’s only decriminalized, yet there are stores selling it all over the country.
Look to the commercialization in US states like Colorado as a better (but not perfect) model.
Sounds crazy, but one of the best models in the United States right now is actually the state of Oklahoma's.
It's fairly straight forward, easy to apply, and barrier to entry is low. Fees are low. Not a lot of red tape. It's working well.
[0] if you want to be pedantic about it, owning up to 5 cannabis plants is decriminalized, but nobody is under the illusion that such personal use scale agriculture is fueling the commercial trade