What reason could Zuckerberg and Meta possibly have for wanting to create a federated social media site?

I'm just curious what you folks think. The whole idea of the Fediverse seems to go against everything Meta has stops for with their existing platforms (Facebook and Instagram).

What are they after? Are they going to try and infiltrate it so they can get people's data and content? Are they trying to monetize it? It just doesn't add up. I feel like most people on the Fediverse already would agree that we don't want Meta's platforms to access our content.

Please excuse my ignorance if it doesn't work like I think it does. I'm relatively new to the Fediverse myself.