Prejudice not being funded on reason cannot be removed by argument.
Except for their genitals, I don't know what immutable differences exist between men and women. Perhaps there are some other unchangeable differences; probably there are a number of irrelevant differences. But it is clear that until social expectations for men and women are equal, until we provide equal respect for both sexes, answers to this question will simply reflect our prejudices.
Many men fail because they quit too soon. They lose faith when the signs are against them. They do not have the courage to hold on, to keep fighting in spite of that which seems insurmountable. If more of us would strike out and attempt the impossible, we very soon would find the truth of that old saying that nothing is impossible... abolish fear and you can accomplish anything you wish.
The world of the 90s and beyond will belong to managers or those who make the numbers dance, as we used to say, or those who are conversant with all the business jargon we used to sound smart. The world will belong to passionate, driven leaders -- people who not only have an enormous amount of energy but who can energize those whom they lead.
Our planning system was dynamite when we first put it in. The thinking was fresh; the form mattered little. It was idea oriented. We then hired a head of planning, and he hired two vice presidents, and then he hired a planner; and the books got thicker, and the printing more sophisticated, and the covers got harder, and the drawings got better.