I'm sure that Facebook could get rid of it if they wanted to. The same way that they could get rid of only fans creators flashing you pictures of their privates in their short videos. The same way they could get rid of racists and transphobes and other bigots. The same way that Google could get rid of the 20 paragraph essays on basic facts you can find in Wikipedia.
It's just that getting rid of these things would be less engaging and lead to a deficit in ad revenues. And they have nothing else to show instead. Because authentic contents do not give them enough ad revenue.
So they can't actually get rid of them without collapsing the business model.
Is there a case for KYC versions of platforms? Maybe platform knows who you are, but you can remain anonymous "outwards"?
All forms of automated detection and generation will work like GANs and race each other.. Leads me to believe something else is the answer.