99% of the moms' problems is they spend too much time sitting in that room with nothing to do. I don't understand why the parents have to watch every class/rehearsal. Is that a requirement? Are they worried that their kids will get kidnapped if there are no chaperones?
I think that it is a requirement for those on the show, not for all dance parents. The producers want them to spend all that time in the room with nothing to do so they'll fight.