Exactly, especially when Google can revoke your account or keys at anytime.

Basically this give Google the way to blacklist any app you release now, in or out the play store for the sake of "security".

It's just about control and finally squashing the app that aren't to Google taste.

I can't image that ad blockers or ReVanced has any real impact on YouTube. I'm the only one I know using either. So that's 1 in about 300 maybe?

Locking down Chrome and killing ad blockers is not some huge effort, it's closer to the flick of a wrist. Neither is locking down android. They can just do it. And if they think there is nothing anybody can do about it, they will, to get that last 0.01%.

But no doubt they are under an enormous amount of pressure to do this from a variety of corporations and governments as well.