The "right to be forgotten" rules are, with all due respect to the EU regulators, pretty shortsighted.
I think the initial "right to be forgotten" lawsuit that Google faced from that Spanish guy-- where he claimed bankruptcy years prior. People( potential lenders?) kept finding that information online through google searches. He sued to have Google remove those sites from the index. He won and the Spanish Judge told Google they had to remove those results from searches.
But it didn't change that the information was still on each site. Those sites, the ones that actually held the information didn't get sued, just Google.
It also opened the door for oppressive governments covering up human rights abuses or hide other information they dont want widely available.
Google appealed and won: https://www.bbc.com/news/technology-49808208
I also want to point out that this Spanish guy's situation is very different from "posting publicly on social media". He was getting written about by others and the courts eventually said "no, this can stand. This information should remain available". So I imagine, public statements made by an individual certainly wouldn't qualify to be forgotten.
At the end of the day, to me, this is a technical decision not a privacy one.
I'm gonna throw this out there:
If Meta is going to join the fediverse (or implement something with activitypub) there is absolutely nothing we can do to stop them.
It's an open protocol. They can use it.
The only thing we can do is force them to follow the AGPL and/or fork the code if they get crazy with change requests.