Maybe we do care about truth, freedom and privacy but the majority of rest of society will happily accept any T&Cs just to get access to whatever the next digital sliced pan is and as for truth and accountability, if they were two sides of the same coin on the ground people wouldn't bend down to pick it up as possesing it looks too much like responsibility and inconvenience.
The watermarking should be on those things we want to verify as something that was not generated or manipulated. Something you'd add to, for instance, cameras. Putting them on the generated/manipulated is backwards as you can never get every model to watermark.
That model is equally bad though. Given that you're writing this in a discussion about gen AI watermarks, how in the world did you come up with the idea that Gen AI wouldn't be able to add a watermark?