Is login with Google a workaround for Apple's app tracking transparency?

With Apple's App Tracking Transparency feature, users can block apps from accessing the unique Device Identifier, so different apps won't be able to share data with each other and ad networks like Google/Facebook, because there's no way for them to know it's the same person/device without that identifier.

Having said that, I would imagine those sites are going to start heavily pushing the "login with Google/Facebook" feature. Using those login features makes it so that the same google account is connected to different apps, and they can now connect the dots on the different data/usage again.

Is this something that would be a feasible workaround for them, or am I missing something? Granted, preventing this would be as simple as not using that login feature.