Men have stronger neck muscles and thicker skulls, particularly the facial bones.
This helps to protect men from concussions.
Men have greater upper body strength and bigger, heavier, stronger bodies generally, so they can, for example, throw something, with far greater force than a woman can. Think of the different speeds between male and female champions serving in tennis.
If you put together female vulnerability to concussions and other injuries, with the greater force that males can exert.
You have lethal danger for women.