The problem women's sport principally has is that it is inferior to mens sport due to the physical advantages men have over women.
Now, I do not want to come across as sexist but sport is a industry that is primarily based upon spectacle, athletic ability and competition and there is no way around that. I mean if we're being serious the best women's national teams are equivalent to very low non-league/high level Sunday league football as there have been multiple cases of top womens teams losing heavily to U15 sides i.e. 14 year olds;
https://www.google.com/amp/s/www.da...team-suffer-5-2-loss-FC-Dallas-U-15-boys.html
https://www.google.com/amp/s/www.da...-Newcastle-Jets-15s-Rio-Olympics-warm-up.html
Now I know that those games listed above were friendlies but it does give an indication of where the level of elite level womens football is at. This is also why womens sport does not receive the same viewers as Men's sport as it is simply not as good, which is also why the lower you go down the leagues in men's football, the lower the attendances.
There are of course some sports in which women can compete with men, motorsports/horse racing etc and of course women should get the same pay based on their achievements in these sports. However, to say that women sport should get the same money isn't really fair as the quality level is clearly different which in turn affects the revenue levels that they are able to generate.