burning finger or can not scan finger scan is happening often, HR department know
finger accident from work and someone's fingerprint is thin can not scan

problem is no algorithm that can convert Biometrics to mathematics or vectors for use with a digital print that is stable and correct 100%
Biometrics still unstable
Another problem is devices for scanning no standard or use what device for standard like finger scan in iPhone and android is difference

maybe it will very large privatekey over 100000bit can store data
and it dangerous if hackers can copy it, privatekey still can change to use another one key never use but Biometrics can not change it