To work with suppliers, consortia, and other standards bodies to
develop consensus and facilitate interoperability.
So how does "the IETF" do this? Talking to others only works in a top-down organization, but not in a bottom-up organization. I don't see how a situation where the IETF, through its internal processes, reaches rough consensus, and then would have to negotiate with external entities, could work.
I think it's important that the IETF can operate autonomously, without "working" with anyone. If suppliers, consortia and other standards bodies have input to the IETF, they can participate like anyone else.