>>> if someone is trapped in a building and the firefighter has to break down the door by ramming their shoulders,...<<<
I don't think males or females use their shoulders to break in doors. They have portable battering rams for that.
>>>women are less effiecient at physically strenous jobs due to diffences of musculature.<<<
It seems to me that you must think that all men are the same size and strength, and that all women are the same size and strength. I am as tall and as strong as some men. I am taller and stronger than some men. and, believe it or not, there are some women who are taller and stronger than me! But because I am a woman I am less efficient?