Because lots of people have inadequate parenting skills (last time I checked you didn't need a license for parenting) and tech companies are actively exploiting that.
If the quality of parenting is so bad that it harms societal well-being as is being argued here, yes. It ought to be a license that one can reasonably obtain, though.
One can link government benefits to it, like Austria does with the Mother-Child-Pass. You need to have it filled out by the doctors and hospitals to prove you took reasonable precautions to ensure the child's safety, only then are you eligible for government benefits.
We're about to own goal because... what... because suddenly everyone ran out of ideas? Because suddenly it's too much work?
But it wasn't too much work to build the torment nexus?