This isn’t about personal use, this is about commercialized industrial sale of recreational pot.
Quasi black markets like this are asking for trouble.
As for pot addiction itself, it is just one of the tragic traits of this age. People have bade God go away, so they fill up their resulting empty lives with all manner of things that won’t satisfy. Eliminating the pot, if it were possible, won’t eliminate the problem.
Sale for what purpose if not personal use?