Doesn't yubikey have an HID mode where it acts like a keyboard and types a static phrase? You could do something like that for boot. Or possibly more complicated. Idk if modern bootloaders support cooler modes where the key resides on the yubikey.
Edit: according to the arch wiki, there are quite a few potential options there if you have a yubikey. Wiki
I'm not asking you. I'm phrasing it as a question because it's one of the most blatantly obvious answers to your question. A taser is better unquestionably when someone is coming after you with clearly not a gun. Yes. I'm not trained but I have enough common sense to realize that not killing someone who's chasing you with a clearly non lethal weapon is much better than killing them.
Bro it's very real. Can't you see the scholarly citation?