> Our advantages in a hostile environmental come from building tools not physical strength. If physical strength was important a male human would not be 5 times weaker than a gorilla.

Have you ever made a tool with your hands? Physical strength--especially grip strength--not just dexterity, is required for tool making. There are no vices or pliers in the Wild.

Men have a huge advantage in grip strength, and hence tool making. This study[1] suggests that elite female athletes in athletic disciplines that require grip strength only rank in the 25th percentile of grip strength when compared to men as a population.