Here's the thing then: nut up and demand it. The reason that employers cave to parents on these things is because they know the child will take priority and the parent will take that time regardless. As they should. Trying to tell half of the workforce that they need to prioritize the job over their children is not a battle you can win.

If you have a problem with that then you need to find an ultimatum that you're willing to stand your ground on. Otherwise just quit bitching because someone else received a benefit that you didn't.