As usual, follow the money. The push for biometric authentication by corporates is so that they can pass the fraud risk onto the consumer, and so they can own you more, and do the back-end consolidation nonsense. There are already much preferable authentication systems for the consumer (e.g. U2F) which can be repudiated, have identity-per-service, and are cheap. But not much implemented because "customer service" being what it is.