> Which is rather likely, because why else would big tech companies push this if it didn't benefit them in some way?

They switched to this internally a long time ago which basically eliminated phishing attacks against employees. There are security teams inside those megacorps that have a general objective of reducing the number of account takeovers, and non trivial resources to accomplish that. Not everything is a conspiracy.

Also, I am sure you will be able to stick to just passwords for a pretty long time while the world moves on to cryptographic authentication. I'm not being sarcastic here.