[ALittleLight]

The biggest change I noticed with respect to legalization is that it used to be the case that you couldn't walk around the streets of downtown Seattle without being offered weed by street vendors, and sometimes other drugs. After legalization and marijuana stores the street vendors (at least those I encountered) basically disappeared.

[chenzhekl]

That is not a good reason I think. It sounds like we should legalize something because we already have no control of it.

[ALittleLight]

If you can't effectively prohibit something you probably shouldn't try. Otherwise you're wasting resources and eroding goodwill towards law enforcement which will be involved in fighting something that people really want to do.

[XorNot]

It implies that it would be difficult for legalization to make the situation worse if you already have no control of it. And as noted: legalization improved the situation substantially.