It really doesn't change it into something you have, it simply gives the user and anyone compromising them via keylogger, slipping yubikey into their own system

It really doesn't change it into something you have, it simply gives the user and anyone compromising them via keylogger, slipping yubikey into their own system and pressing button, etc a way to avoid typing. Something you have exists in the form of things like smartcards. Crypto stick, https://www.crypto-stick.com/ https://www.crypto-stick.com/, being a great and user friendly example of.