They should have been aware that they would face dangers and they could be putting their lives in danger by getting involved with such things.
It was not like Cheryl sent each person out to die on each task since that was not the type of person she was.
It was not beneficial to her to lose subordinates like that and what she valued was the talent.
The talented and capable people would be most valuable to her so she treated them quite well whether it was providing support or paying them well.
She was not the type of person who would be so willing to throw away a good card that was in her deck unless there were special circumstances that demanded it.
Even with the most recent losses she ended up in a not-so-good mood since she had likely not expected to suffer such losses.
She was not the type of person to let people go into tasks unprepared so they would be briefed beforehand which reduced the danger too.