Assertive Women and Men

I was watching a special on MTV about Nicki Minaj the rapper/singer girl, and she made a point that I have after hearing her say it, thought about but never put into words. She made the connection between assertive women being considered bitches, and assertive men being bosses. There is no difference in the act of being assertive, the only difference is the gender of the asserter. Why can't women be bosses that are assertive and knoble? Men are considered great leaders if they push people and demand their best. But women show the desire to push and demand greatness out of their employees and they are not praised, they are punished with foul comments behind their backs. Dang something has to change.