I can't think of one single practical use case for this that would benefit my life, because, right behind the glasses I have my very own locally available facial recognition built in.
A lot of people are face blind (including me), and it's extremely embarrassing, especially when I'm supposed to remember a person's name. Wouldn't wear survialiance tech to try to fix it though.
3 in 100 is a lot, yet I have never met anyone in person who disclosed that they are face-blind. Your flock needs to break the stigma and mention it more if possible I guess.