As a parent you need to control your child, if you find out this is happening, why would you put a rubber stamp of approval on it.
My children have parent and I dont want Susie's parent that have a screwed up life and little to no morals effecting my duaghters outcome in life.
How is it stupid? Kind of like telling you kids it is ok to have pot in your room, but don't get high. there are only two reasons some one would be on the pill. Either you have a legit medical issue, or your currently (or getting ready to) spreading legs.
BTW some women/girls get on the pill before their first sexual experience. You don't have to be currently, or in the past, sexually active to get the pill.