Edit: I was wrong, I posted before checking the facts. 10 minutes of research indicates that the USA women’s team plays similar stadiums at similar prices to the Men’s team. The answer may be about televisions rights, or that the Men play in leagues that pay better per game, and transfer that expectation to the National team, but what I said was wrong. I am a woman, and I can honestly say that I find men’s football more entertaining.
This could be the cause of social conditioning, but I have tried to sit through a women’s football match, but really struggled, and had to switch the channel over. A better question is why are women paid the same prize money for Wimbledon when they have shorter matches? Since when did woman have less stamina than men? Same prize money should be best of five for women too.