Saying that fingerprints are a bad biometric because some people can't use them is like saying escalators are a bad idea because some people can't use them.
They might be a bad biometric but it's not because they aren't universally available to everyone.
When it's used as a gate, it is an issue. It took the Seattle PD and whatever agency actually issues civilian CAC (HSPD-12) a long, long time to get enough prints to allow me access to do my job. Both eventually had to accept three very partial prints as evidence.
Fingerprints are a horrible biometric.