I don’t know how so many people are so devoid of understanding of something that is such an integral part of human civilisation the world over.
People find something they like. Let’s say is basketball. They like playing the game and want to be better so like watching people better than them so they tend to watch the best. Then they also find out they like watching it for entertainment sake. But anyone that has ever watched kids play sport know watching lower quality sport rapidly decrease in entertainment value.
Why would you go actively out of your way to watch an inferior product?
There are so many amateur male athletes that are better than female athletes. But no one goes down to their local game and watch a load of randomers play sport.
People watch the top league usually the club and the international if that sport is international. Then they will watch not their favourite team but other teams to get a better idea of the league. Then they will watch the feeder youth league if they want to. Then other countries leagues or lower leagues. All of these link together and all of them will be a better level than top women’s league.
Usually at the point you run out of time to watch any more or you just like sport in general and go watch the top tier of another sport.
There needs to be a reason to watch and the only reason I have found to watch women’s sport was to watch the UFC because that’s a player on player sport not achieving something. But the women have a lot less power and a lot more flexibility so the strategy is entirely different and sport looks different. In that sense in that entertainment value men can’t achieve that, in all other sports men seem to do what women do but better.