Crab,
You're completely wrong. Fractured femur, lying in the cold and wet on a mountainside, is always a dire emergency.
Firstly, they could have significant blood loss from the femur.
Secondly, they may well have other, as yet undiagnosed, life-threatening injuries.
Thirdly, they are at significant risk from hypothermia.
You don't leave this person waiting hours for a better equipped helicopter.
David