It's not okay regardless who is doing it.

Or - it is okay depending on who does it.

You overlooked that small detail where for services where the cloud does not require plaintext, Apple encrypts everything with a key that never leaves the client.

Cool. Challenge to you; get some plain text from another google user account that's private.

If you do, don't reply in this thread. Just go straight here: https://www.google.com/about/appsecurity/reward-program/

I don't think he's worried about other users getting access to data, but what Google is actually doing with it themselves.

Yep.

Now you overlooked that small detail where it's Google that is exploiting the data, not me. And doing so on behalf of itself, its partners, its future partners and assignees in perpetuity, and your ex-wife's lawyer.