This has become an interesting thread and one of the reasons I find this message board so fascinating. Our opinions are all influenced by our experiences. Because my experience with my dd just starting out on team was at a gym with very low hours, parents were trying to figure out how to get more gym time for their girls, not ever less time. (In fact 1/2 the L5 team left to go to a different gym to get more hours.) Before reading this thread, it never would have even crossed my mind to think of a girl "getting" to come less as special treatment. I have always only thought of "special treatment" as getting extra coaching, more time, free privates, etc...
I guess if my kid just starting out on team was complaining that another kid was "getting" to miss practice, that would be a red flag to me that either my kid isn't into this as much as I am or that there is something in the gym structure that is not a good fit (like 9pm practices for a 6 year old!!) As far as teaching kids what it means to commit to a team, it is a rare 6 or 7 year old who is just starting out that understands what all that entails- it is the parents committing for them, not the kids.
It is sad that there are little 6 and 7 year old wanting to try brownies or whatever (or just want more sleep!) and can't because their parents have committed them to 9 or 12 hour practices because the parents feel like they don't have any other choice if they want their kid to be on team.
My kid absolutely loves the gym, but it's a lonnnng school day. She is tired sometimes, and I make her go anyways (not if she's sick obviously). But that's our gym's rules, and any time I tell her, "we don't have to do this if it's too much," she rallies and is eager to go. If another child was "missing" practice, she would for sure ask why that child gets to skip all the time. So, yes, it is the parent who makes the commitment. I agree that it stinks that these little kids have to do so many hours. I really dislike that, but apparently this sport is sooo competitive or the peak age is so young, that it's the expectation before the emotional maturity is there. And 9 pm is definitely so late. Literally , our gym and every other one I know of around here would say "too bad, so sad" if I asked for modified hours on a regular basis. THAT'S what this is about for me. Not who has what skills. Although listening to parents talk in the gym room, I guarantee that would be a complaint too. I agree it's given me a lot to think about it too. It's the only sport I'm aware of requiring so many practice hours of kids.