I can agree with that as far as it goes. In some workplaces there can be zero sum cases where someone has to be on duty. If it comes to that someone who has a sick kid to look after should get the flexibility over the person who doesn’t. And hey if the parent’s kid is not sick, and the childless person’s grandmother is, then THEY should get the flexibility.

Just stop saying that you need all the same flexibility as parents. You don’t.