Sure, Miley embarrassed herself all on her own, but she was given a tremendous stage on which to do so, and nobody seemed to be interested in stopping her from diving off.
But why would MTV do that to Miley? The better question is why wouldn’t they. She’s releasing unlistenable SoundCloud albums with Wayne Coyne without her label’s cooperation. She’s not going to be on the radio. MTV doesn’t need anything from her. If they wanted to sacrifice a career live on air for the sake of ratings — or, if you want to give them that much credit, to make a point about white privilege — who more high profile and expendable than Miley?