[bdhess]

Both of your factors boil down to the physical presence of two things that will usually be in close proximity to each other. Is it really fair to consider that “two-factor”?

Both your fingerprints and the vault can be taken from your person without your consent; a password much less easily.

[UncleMeat]

If somebody has the ability to force me to give up my fingerprints, I am also going to give them my password. Hard to say no to somebody with a gun.

[Sir_Cmpwn]

The adversary under consideration is more likely the courts.

[wbl]

You leave latents all over the place.