I believe the point is that if the target audience includes kids, you get stuck with the restrictions that implies, whether or not they are the majority. Some of this is directly legally mandated, some of it is indirectly legally mandated by fear of lawsuit, and some of it is mandated by avoiding bad PR about any bad thing maybe possibly happening to some kid somewhere because of your app. By that, I don't mean to minimize concerns about the real possibility of things that could be bad, but to highlight the fact that the PR disaster doesn't even need a real bad thing to happen, just a semi-credible accusation made to the right media for any reason.

None of those three concerns can be fixed by any amount of "resource investment" that will satisfy anyone. It would just get them accused of censorship anyhow.