Because its not fair for the kids that dont have moms or have two dads. They also changed the father daughter dance to a "super hero" dance because not all kids have dads.
So everyone has to suffer.
My kids school is notorious for hiding thingd. The new b.s coming out of camp crazy is they want the good students to help the "bad" or emotionally disturbed kids. Soooooo all the classes where rearranged so that all the little ****s were mixed in with the good kids. My son routinely complains that half the teachers day is spent chasing kids around instead of teaching. Parents complain and want these kids to be placed in a special class.... nope its not fair to label said kids