I did not want to say that cash ATMs are privacy-friendly. They are not. But collecting biometric information is imho definitely another invasive step, because you don't know where these data end up. Because these data are directly tied to you as a person, they might ultimately be used to identify you in all kinds of situations where you are totally unaware of it. On the other hand, if you insert a bank card into an ATM, you make (more or less) an informed decision to provide your personal data in this situation (only).
Sadly, I think the surveillance trend won't be stopped in the foreseeable future...
ya.ya.yo!