I don't care if it's "reactionary" or a "critique". It's fucked up to have close-up shots of children's crotches while they're dancing provocatively. That's not necessary if your goal is to simply "critique" a culture. You can show what's going on with wide angle shots of the entire stage without zooming in on the sexual organs of pre-pubescent children.

The sorts of angles they showed in that film are what you'd see in a porn, not a TV show or movie. You don't get a free pass doing so just because you want to show people "what is going on with children these days"