[McDiesel]

I get that... its a legitimate concern, as I said. However, its no more legitimate than the other 100s of prescription drugs that can cause drowsiness or slowed reaction time. Or driving with the flu, or driving tired.

Thats the point - there are literally 100s of other ways to be just as (if not more) impaired while driving and be completely legal. We don't parade those issues around (namely because the big pharma companies would like people to not realize just how impairing their products are)

The difference is that there is a large enough group opposed to legalization that they make this issue a primary one in their fight against legalization and blow it vastly out of proportion to the actual scale of the problem.