Why do you think that someone with a camera off is not present? How can you honestly equate camera-off with absence?
> There are exceptions of course
imo it's the opposite. Rarely to never does it matter if you see my face in a meeting. It's an exceedingly rare exception that you should need to as a business requirement.
Have you considered that... _you_ just like having your camera on, and like seeing other people? And other people just don't care?
Furthermore - even if you were right, I would say it's a good thing that busy people have a socially graceful way to opt out of the organisational mistakes of others.