Yep, another way of looking at it is if it leaves your device, assume the information is eventually open to the public.

Amen. Once you upload it, you should just assume it’s out there forever. It’s probably worth assuming that virtually all anonymity can be pierced, if not now then within a decade or two.

With a few exceptions, anonymity online is ephemeral at best, subject to the motivation of the person/org trying to deanonymize you.