If the girls who work hard all year bettering themselves, why would you not play them girls regardless? You think the football coach would let guys play just because it's the school team? if they don't want to better themselves, then that is their choice as well. But if girls think they won't make it because a school may have 6 or more players that play year round, oh well. That's exactly why they play year round, to be the best they can be at it. No matter what sport it is...
Usually the girls that play travel ball can click, no matter what as each year there are new faces on most travel teams. Heck, how many are asked to sub on teams they never have known anyone on a weekend if they are off? I know mine has and loved it. When they get between the lines, it's like a switch is thrown and the talent just takes over for those ladies, as they all have the same goal when they are out there. There is no room for the ME Firsts of the world.
The successful ones have also figured out that you play for the coach who is coaching you at that particular time. Sure take some things you learn from each as you do with anything in life, but if the coach you are playing for at that time asks you to do things a certain way, you should try and accomodate if it makes sense...