Although I think that social media causes issues with underdeveloped brains, If this is about confirming age at the point of login, then this is really about id

Although I think that social media causes issues with underdeveloped brains, If this is about confirming age at the point of login, then this is really about identifying everyone and not protecting children. If this is the case, you know they are going to use this data to target people for speech related things.