I’m speculating here, but you got to remember, the absolute first objective was NOT to win the race, so race tactics took a back-seat in this one. The primary objective was to secure a qualifying time, thus she was the one that went right behind the pacer, and targeted an 8:50. So mission accomplished.
That's a good point; it's why everyone wants to run BU in the first place. 3k is going to be fast to qualify. #16 right now is Ella Baran, 8:58.61.