https://duckduckgo.com/?q=Is+biometric+verification+a+long+term+security+risk
Or choose your own search engine and search terms related to risk/risks and biometric verification. The application of straight logic would allow someone to come to the conclusion that the ability to perfectly digitally duplicate any individual's given biometric markers would raise a security concern. And those markers are being stored digitally.
Just like many are willing to give away every bit of their privacy in other ways to gain convenience, this is but another one. There are plenty of legitimate concerns whether you share them or not.
I'll be sticking with passwords/codes/phrases, thanks.