OpenAI is entering partnerships with specialized groups and organizations for many safety related areas of interest. This is one of their moves with a special focus on child safety. You can compare it to a regulation to not put your child in the front seat of a car without a seat belt. The adult is driving but the child is most at risk.
This also has nothing to do with moral superiority. Since 80% of the countries on this planet have national plans of action and policies against child abuse it’s safe to say that this is the norm.
You should also get acquainted with the moderation endpoint. It’s a recommended best practice anyways.
Lastly, how can something that has been published on their website for the whole world to see be ‘hidden’ at the same time? I’m going to disregard this diversion from the subject matter at hand.