That's the argument - you are already required to show photo id and have a person compare your photo to your face. This replaces that person with an algorithm.
Think about the implications for whistleblowers, journalists meeting anonymous sources, activists, immigrants, etc etc etc.
[1] https://www.nytimes.com/2014/06/01/us/nsa-collecting-million...
[2] https://www.aclu.org/issues/privacy-technology/location-trac...
[3] https://www.propublica.org/article/machine-bias-risk-assessm...