> unless you choose to make data from these services available to other Google services that support personalized ads

I don't know if android has changed in the last 10 years, but my last android phone had constant popups in official google apps begging me to enable all sorts of information sharing right across google's ecosystem. The popups were constant. And it was full of dark patterns making it difficult to say no.

Google probably assumes you only see this stuff once. But if you say no, some features didn't work properly and it keeps bugging you.

I don't know how or why, but I wouldn't be at all surprised if 90% of gmail users unintentionally opted themselves in to this "choice" before the end of the year.