We fear letting go of superstitions and biased beliefs that pretend to explain the world and ourselves. Many who imagined a limit on what females could accomplish have been as wrong as those individuals who said that humans would never fly. For centuries, women appeared inferior, not just to men, but to women as well. People viewed (many still do) women through the distorting lens of sexual bias. If the example of women contradicting so many beliefs of sexism will not convince you that the explanations that we take for truths are doubtful, then I wonder what will.
Sometimes it is wonderful to be wrong!