In coed softball leagues, they usually have a minimum number of women on the field at a time. If they didn't, the guys would have a couple of females that sat on the bench and maybe got in when a game was out of hand. There have been several attempts to get women into professional sports, either as a hockey goalie or in basketball. These experiments start with great fanfare and end with a whimper. Usually, they don't even report on the tryout cause she gets whipped so badly in the first twenty minutes it's embarrassing. A few years ago, there were all these headlines about the first woman to compete in NCAA men's football. She was a kicker, and she didn't kick off or attempt field goals. Extra points only, and I think she missed one of those.
There are always made up events, where they get the top female athletes to compete against average guys and they make a big whoop about it.
Men can't be allowed to compete in women's leagues or brackets because if they were, there wouldn't be any women's brackets.
I also understand why men don't want to play against women when they signed up for a men's league.
I'm also tired of people pretending that women can compete with men in athletic events. A top woman can compete with an average guy, but at the top level there's no contest.
Examples (may not be exact numbers, but close): Top female bench press without lifting shirt is 420 pounds. Top men's is over 700. Top female with lifting shirt is 520. Top men's, over 1000 pounds.
So it helps if you lift your shirt?