ICYMI
Back in February, reporter Joseph Cox was able to trick his bank’s voice recognition system with the aid of some recorded speech and a tool to synthesise his responses.
https://www.vice.com/en/article/dy7axa/how-i-broke-into-a-bank-account-with-an-ai-generated-voice
If an attacker is determined enough to find or create five minutes of your voice recordings, they are unlikely to be deterred by the (probably much easier) task of finding out your birth date.
https://youtu.be/kqYSIU70N68