...sorry ;)

It is something I thought about, that he mental/social development would also be stunted.

As for the brain development. Those "doesn't fully develop until 25" studies are known bullshit. They just sound good because people like either infantilizing themselves "my brain isn't fully developed!" or feeling superior "their brains aren't even fully developed."

Society is going down a bad path and none of it makes sense.

Eh, like you said, nothing beats a real little girl.