The difference between how you're treated for consuming alcohol (which as far as I'm aware is objectively more dangerous - and more immediately so to other people - than marijuana) and for consuming marijuana in most places is pretty ridiculous, to the point of almost seeming like satire. Alcohol also has a pretty significant (don't think it's quite this significant, granted) effect on coronary health, not to mention liver damager, etc. And yet the reason for the difference is that we just accepted alcohol prohibition doesn't work. But guess how easily you can get marijuana, even where it's illegal at the state and local level too...
To be clear, I think this is good research to be done. Better to know about this than not, obviously, and I hope it leads people to make some better life decisions. But I'm also anticipating that this is going to get held up as, "You see? It's the devil's grass!" in a very illogical and inconsistent way.