According to "Into Thin Air" how is Ingrid Hunt responsible for Ngawang Topche's death?

Ngawang Topche, one of Scott's sherpas, had been feeling weak for a few days. Sherpa's are expected to "tough it out" to maintain their reputations and hence get the best paying expiditions. Instead of going to base camp, Scott Fischer "suggests" that Ngawang continue to Camp Two. Ingrid Hunt the camp doctor didn't protest. Ngawang will eventually succumb to High Altitude Pulmonary Edema. Fischer should have ordered his sherpa go to lower elevations instead of climbing to Camp Two.