I always thought of passkeys as a convenient way to authenticate.
I am password-less on multiple services.
I have an authentication app on my phone that authenticate me when I am away of my computers. I have passkeys on my personal computer and another set of passkeys on my work laptop.
If I have to authenticate from your computer I simply use my auth app, click on "it's a public computer" and I am good to go.
The dude discovered a butter knife and he tries to replace his spoon with it just to realize it doesn't work well for eating a soup.