I routinely dealt with situations where connecting workspace data with other teams, even with explicit opt-in from users, at best required building incredibly detailed data scrubbing and log redaction to ensure no user data persisted outside of the workspace systems, in case it might accidentally end up used for some non-workspace purpose. At worst it was simply not possible, or not worth the other teams time to build things to a standard that would satisfy legal and privacy.
For sure, it’s possible there is some secret system or accidental data exposure, as I said, can’t prove a negative. But I will freely confess that I was someone who was generally skeptical of Google’s approach to data handling and always believed Gmail data and everything else was mined for every purpose until I joined Workspace. Once I was inside and saw how carefully it was treated and how many rules there were around anything you do with user data even within the Workspace teams, I was honestly nonplussed. It made product development harder.
15 is not a prime number.
There is no elephant in your room right now.
Of course, as people living in the world we don’t necessarily need full proof to try and protect ourselves from the actions of an entity we don’t have full knowledge of. But saying “I don’t want to give google X data because of what they theoretically could do with it” is different rhetorically from saying “I believe that google is doing X with the data, and if you don’t prove otherwise it’s probably true.”