The problem with talking to a telco, is you have to talk with not just one but any your customer may use. And if at the customer location there’s multiple routers in between the cameras and that telco router, it’s a shitshow trying to configure anything.

Much easier to drop some router on site that is telco neutral and connect back to your telco neutral dc/hq.

The Metro Ethernet Forum standardized a lot of services telcos can offer, many years ago

That's all true, but you can also, you know, like, talk to people without buying your whole solution from them :)

(btw, have you actually read past the first 7 words? I'm much more interested what people think about the latter parts.)