I am not sure how you meant your post to be received, as tone and intent are always difficult in text.
To me, your post comes off as a little negative towards the USWNT.
I agree, most of the world might not care. But many will. (I think you could say that about many things.) We are a huge sport family and of course we have seen the coverage of Messi greatly overshadow the Women's FIFA this week. Yes, that does prove your point. But we don't need to put down the accomplishments of the women in order to acknowledge the popularity of the men. The men have had much more time and opportunity to gain popularity, as you noted, so this should not be a surprise that they have more interest.
I think that the USWNT had to fight hard to get where they are and I think their fight will help others around the world. This is good for everyone. FIFA has also changed their rules slightly so now athletes may have more opportunities to play for another country, which may have some impact, as well.
Our family follows the USWNT but has never watched a men's game, ever. Yes, I know we are in the minority, just saying we are excited for this tournament!