For whatever it's worth:
I've been involved with wildland firefighting for about 20 years. During that time there was initially a strong bias against women in wildland firefighting because they were seen as weaker and less less capable. Women were percieved as less able to heft tools and hike long distances to attack widlfires.
But, over tiime, there's been a gradual acceptance of women in the wildland firefighting ranks (a very macho profession to be sure). Where once there was rejection, there has been gradual admission that what women lack in upper body strength, they make up for in endurance. To wit: When the strong guys poop out after lengthy assignments on the fireline, the women continue going, albeit at a slower pace.
The upshot is that both gender advantages complement each other. The guys hit heavy and strong up front, the women keep going after lengthy days on the front. Not a bad combination, in my experience.