High potential for abuse? Based on what?
The argument is that people are willing to break the law to get marijuana, so that constitutes a high potential for abuse.
You phrased it in a manner that suggests that's not your argument, so please don't take this personally, but that is some serious Naso style logic.
You are correct, it's not my argument, but I've heard phrases like it many times, including from anti-marijuana lobbyists, but I have no one to attribute it to. I just thought the thread should have an example of what is said.
What does high potential for abuse mean? That folks will buy it illegally? If so, that is rather circular, and as it is legalized by more and more states, it won't be illegal to buy it, except in the eyes of the Feds.