How? The publishers publish AMP pages, and multiple link aggregators (including Bing) consume them. I could see an Apple News style system being controlled like that because it forces the publishers to directly integrate with a single link aggregator.
Yeah I'm really lost about the AMP doomsaying. The fact google has a standard that anyone can use that lets pages be delivered faster and shows an icon on results that do that really doesn't seem like the sort of thing to get worried about. It's weird that this gets treated not only negatively but on par or worse than closed garden platforms.
It gives Google more control over basic functionality of the internet. They already have _far_ too much control in the form of the biggest browser and the biggest search engine. Anything they do to expand or capitalize on that deserves a _lot_ of scrutiny.