Sometimes people post that it's not fair--women get to wear pants, but CDs are disparaged for wearing skirts.
Women wearing pants; voting; working as doctors as well as nurses; being CEOs as well as secretaries; and all the rest, was a decades-long process of liberation: accepting that women are capable adults who can be counted on to keep up and do well in what had been a "man's world" in the workplace.
When you wear a skirt, do you have any feeling about gaining acceptance in the "woman's world" of nurturing children & the sick; preparing food for friends & loved ones; doing the menial work because it's not fair to push it off on others; sharing your feelings with friends & listening supportively without trying to solve their problems; and all the rest?
The asymmetry between attitudes toward tomboys & sissies is partly just that people honor the search for higher status, and still regard women--overall--as having lower status than men. Do you want humbler status?