A man's musculature is a natural occurrence, it's not an accomplishment, just as a woman being able to produce people is a natural function, not an accomplishment. I could say men are inferior because they can't bear their own children; they have to go through another human being in order to procreate. Men can hardly take credit for being stronger-you're just born that way.
Men's inability to bear children has partly led to women's domination. After all, if you don't own a uterus, the next best thing is to have absolute control over one. In order for men to know who their children are, they must keep tabs on the woman in their lives.
If men cannot bear children, then they must go out and become something useful, otherwise they're just baggage. I might add that everything they've accomplished, they've usually achieved without raising children simultaneously. I'm always amazed at how men say, "well, if women are indeed equal, where are their accomplishments?" We've only had the concept of daycare for 40 years!
Men and women's IQs are the same, their math abilities are the same, women's brains actually have some advantages over men's.
I find it short-sighted to expect equality to mean 'doing the same things' yet I read it constantly in forums. "She can't run as fast, so I'm better..."
A carpenter is equal to an insurance salesman. The physical strength thing doesn't work because men always have other men who are much bigger and stronger, yet the weaker ones are not considered second-class citizens.
We have been considered inferior because the voice of most civilizations is male. If we leave it up to them, who do you think will come out the better?