Think of how the structure of Meta is gonna work, there's some team in charge of ads who has a sub team now in charge of messing with the ads to stop them being blocked.
If you start whitelisting everything that isn't an ad you move the problem into an area the team in charge of blocking the ads don't have control over.
Highly unlikely the team in charge of stopping ad blocking has swing to then start changing the code of every other element on the page to break your non-ad white listing.