But if my fingers are my password, they could either force me to unlock right now and have the problem that it locks again after some time of inactivity (depending on the impl on the other side), or take away the fingers (instead of a password) with them and be able to unlock as often as they want (and the fingers not rot) :)

I'd rather them take some knowledge and not harm me, or rather: make the harming part less likely.

tldr; my point isn't about keeping the account save, but about the potential risk of injuries to my body.