Sure, women's national soccer teams regularly lose to U16 boys teams, so the quality of play is quite a bit lower than the highest men's standards at the moment, but that can also be said about every league in England below the Championship.

Look at League Two, the lowest pro league in England. Managers earn 50K, and the players earn 750 pounds a week, or roughly 65K Canadian a year. The top team in that league, Portsmouth FC, sees 15K in the stands every week, but most see half that, at best.

League Two is VERY comparable to the NSWL for attendance figures, actually.  The Portland Thorn see the most attendance in the NWSL, and get 15K a game, and the league average is just under the League 2 average.  The NWSL should be able to match that pay level, no? Sure, League Two has TV coverage the NWSL does not, but surely that's a problem with league marketing that can be fixed?

I think a market exists, but looking for a market as equally lucrative as the top men's leagues is a bit naïve.