Yes. If the privacy control only exists per user, it isn't a control for a team.

Defaults matter more than the blog post. "You can opt out" is not the same product as "the org can actually enforce opt out."

A watermark answers "did this model touch the file?" It doesn't answer "did a person read it and stand behind it?"

Detection will get gamed, and a lot of useful text is already mixed. The more useful check, for me, is still human: would I put my name on this before it goes out?

this is going to be the big thing in the next 100 years for me. where there is a human, there will be context, passion and meaning. it's the old saying: machine can tell you what, but only humans can tell you why.