Well did it ever occur to you they might not have had one or how about this, perhaps the one they do have was eating, on break or indisposed when this female passed through? The fact is they did give her options and she had a choice although I think the one she took was wrong that is her fault not the guards.
It’s my understanding that a female guard is to *always* be present just for these situations.
The options they gave this woman were to take her bra off in her car or in the building. Quite the option. So, she could have gone out to her car and removed her bra, walking back to the building with arms crossed so as to prevent a sway and embarrassment, or to remove her bra in the foyer as her husband shielded her. They chose the latter.
Again, a female guard could have easily cared for this situation w/o any undue harm.