This really comes across as if you just keep shifting so that you can continue finding something to complain about. It’s ok to just not like having your camera on man. Not everything has to be the kicking off point for a sociological or anthropological study.
Backgrounds visible? It forces you to have your space display worthy!
Backgrounds blurred? Everyone knows your place isn’t display worthy and thinks you’re a disgusting pig!
Company provided background images? Corporate endorsed removal of individualism!
What you’ve touched on here is part of the intent. Not that they want to erase individuals, but that in general a more controlled corporate image is seen as more professional.
If you want to talk about how/why that’s a thing, be my guest, but that has nothing to do with video conferencing. Work dress code and even work uniforms have existed for generations.
But then what am I supposed to do with this mass of gravel?