Baby nails are sharp, thin and attached to a thing that flails around aimlessly. The greatest danger is to eyes.

Yup, my daughter cut her nose quite a few times just rubbing her face, and slice us regularly. They grow from well trimmed to dangerous weapons in less than a week so there’s no avoiding it really

they are often on flesh that has no callus

They can scratch you while still in the womb. From what I heard it's not fun.