Low security is security too. Biometrics can useful when used for appropriate applications. They're very useful in applications where authentication would be

Low security is security too. Biometrics can useful when used for appropriate applications. They're very useful in applications where authentication would be otherwise be omitted or undermined due to usability concerns. They can also be used in conjunction with other authentication methods to complement the flaws of other authentication methods, like passphrase or token, which can be shared more easily. Like with many things pertaining to security, there are no universal solutions without first defining the problem. Say for instance, you have an access control system where you want to solve the issue of credentials being intentionally shared. Biometrics are a great solution for this; tokens and passphrases are not. You need different tools for different problems.