So their vision of the future is that to do anything online, one MUST have a phone (ahem, portable wiretap)? And they're going to be keeping my secrets for me, for my own good? I'm not sure I'm down with any of that.
It's very hard to make a privacy case against FIDO. Practically speaking it's one of the best things that happened to privacy&security since the invention of asymmetric cryptography. The deployment of this tech reduces phishing effectiveness to near zero, or in many cases literally zero.