Social interactions should be reciprocal. To those who keep bringing up telephones and email, when on the phone or email, both parties are in a reciprocal, equal relationship as neither can see the other.

When in person, one person wearing a face mask means the relationship is not reciprocal and one person is at a disadvantage.

Facial expressions are so crucial to human communication, even dogs have evolved to understand and use them:

https://www.sciencealert.com/dogs-facial-expressions-cognition-human-communication-october-2017

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4785927/figure/RSBL20150883F1/

That is precisely why extremists enjoin women to wear face masks, to make normal social communication impossible.