The Quest 2 is a third of the price of its competitors and that is only possible because Facebook values your data enough not to gouge its customers like Valve and HP.

Personally, for $600 I am happy to let Facebook know what VR games I like so they can better target advertisements an support more popular game development.

Facebook is not looking to do anything malicious, they simply want to research their consumer audience so they can make the best experiences available and, ultimately, sell more games and VR. But who doesn't want more games and VR to buy?