The simple proof is how impossible it is to even create a single playlist for children on YouTube. The brands actively create more and more official channels to offset parents who are saying to not show a channel in their feed anymore.
You have a great point about what other children do you or don't do. The Every Family is Different Angle is one that I like and also that people who know how to talk to each other will be more able to lead themselves and others compared to anyone who just listens and watches all the time.
There are so many dangers out there and really especially with AI now able to ramp up everything, those dangers are going to increase and there's going to be something needed because otherwise the entire world directly or indirectly is coming into the little screens and little brains unfiltered and unmanaged.