Social media in an ad economy serves two masters.

End users should be authenticated so you can prove you're selling real eyeballs in the demographic mix you claimed to marketers and to provide lip service for the 'think of the children' regulators.

But anyone who's paying for ads should have as little friction as possible to dropping money and spewing garbage.

I'm surprised nobody is looking at some sort of "corporations are people" angle here-- we've attested the device ownership, but it's owned by the Lorem Ipsum Corporation, which is a legal/demographic dead end and spawned just long enough to buy the device.