Secondly, the biometrics are just an additional method of payment, it's entirely optional. No one's stopping you from paying in cash.
Oh, yes, because optional things never become mandatory. Only 10 years ago, the EZ-pass highway electronic payment system was optional. It even offered a discount (initially).
Now, there are several bridges where cash payment has been eliminated altogether. And many, many locations where the only available cash lane requires extra 15 minutes of my time.
I am talking about US, but I am sure such "optional" feature creep is an international thing.