[giantg2]

BAC need to be under .04. It's worth mentioning that any marijuana use is instant disqualification, even if it's prescription. All sorts of medical conditions can be disqualifying. Even stuff like high blood pressure or COPD.

Then you have things like one must be 21 to cross state lines, and 18 to get a learner's permit. Some criminal history, like felonies, will prevent you from getting a license.

So it's a bit more than not being on the verge of a diabetic coma. And if those restrictions are a good idea for personal vehicles, then why not do that for everyone?