Why are high school sport teams unfair?

[~me~]

At my high school, most athletes play for some kind of a club. In my freshman year I was put on the frosh-soph volleyball team and put my best effort into it, oftentimes got playing time in the games and tried to stay positive no matter what happened. My parents are facing financial problems and club sport was something that we could not afford, no matter how much I wanted to play. When the head coach found out that I was not planning on playing club volleyball, he very politely hinted that I might not make the team next year, and indeed next year I was told that I am too far behind on the skills to be on the team, even though they loved my effort and positive attitude. Since then I met many students in a similar situation where they could not play a sport because they were not good enough for the team even though they were willing to try their hardest. In particular, a girl whom I know tried out for volleyball with no club experience and she was not even given a chance to learn the skills necesary to succeed in the sport, although she would probably have the ability to if given proper instruction. It appears that coaches look for players who have already been properly coached by the club teams and the team players are expected to take private lessons and play for club, which, face it, is pretty expensive. Those who cannot afford the luxury of playing club or simply don't have the time it requires are denied the experience of playing a sport they love. Not everyone is going to be a star player, but those who want to play should be given the opportunity to at the very least. I looked into sports outside the school limits, and most city-based sports teams are up to 8th grade level. Once you are in high school, it comes down to playing club or not playing at all. I think this is a big issue, since most high schools including the one I attend put very much emphasis on sports, but not everyone is given a chance. Is this issue common in other schools, or is it only obvious in my high school because it is in a wealthy neighborhood? And please give me your opinion on whether or not this is something worth trying to fight, maybe I'm just overreacting on this situation? To me it seems that high school does not establish equality among students very well because those privilaged with money have more opportunities laid out in front of them