I do think it's about Google trying to squeeze profits out of Android, but is there more direct evidence of this? Cause I always have to wonder if it's something else like KYC.

Of course Google generally tries to squeeze profits out of… whatever it does, but eh, by closing something? Google is the company that makes a million in profit from the openness of the web in the time it takes me to write this paragraph, why would that company think that closing something improves its competitive stance?