They gave her tons of choice, as, after she took a couple out, all they wanted to do was escape. And she made certain they couldn't.
Except for the part where letting them escape so she could locate the entrance was part of her plan. But she could have let most of them go, instead of only 1 and a half.
It matters in regards to whether I can still sympathize with and root for the character.
If she's just a monster, I no longer care about her journey.
I'm not sure that excuse flies for someone who is supposedly the Master of Wisdom, specializes in perception, and has 4 minds. She should have complete situational awareness.