You say it's "not moral or right"; so, what would you suggest? I agree applying the lowest common denominator is not necessarily the best (nor fair) way to do it; but, how do you handle it?
Do we agree that there is some level that effects everyone, even if that level is different? Do we require all THC users -- smoking, edibles, vaping, topicals, etc -- be tested to determine the level where they become impaired?