Whether it's okay to inspect traffic only depends on whether you own at least one of the endpoints. It has nothing to do with whether it's going over your network.
We are talking about networks where every authorized endpoint is most certainly owned by the organization doing the telemetry. I don't like it either, but I don't see how anyone's going to make a moral issue out of it --- in fact, this is exactly the kind of thing that tends to infuriate nerds like us when it cuts the other direction, like with sealed remote attestation protocols.
Yes, I believe they own all the endpoints, so I'm fine that they're doing the telemetry at all. But if the method they had in mind for doing the telemetry doesn't require that they do, then I'm opposed to that method in particular.
You get that Intel can make the same argument about sealed remote attestation protocols embedded in their chipset, right? You don't tolerate that argument when it's your network hosting sealed protocols, but you do when it's other people's. That's a strange position.
