Does the law firm have 100,000 employees? According to their website, they have about 29 attorneys in the firm. Bringing up companies the size of cities compared to that is completely ridiculous and irrelevant. And companies like Meta, Google, Apple, etc. will absolutely enact draconian policies when IP and other litigations are going on. The secrecy and policies those companies put in place likely go well beyond simply not letting a lawyer part of a law firm that is suing one of your businesses into your building.
Why does it matter where she's licensed? It's irrelevant.
Lawyers play these little games all the time. I'm not necessarily for the policy or the use of facial recognition to enact it, but they were told ahead of time. They should know better. If they wanted to argue the points ahead of time and get approval, they could and should have.