I read that article and I thought her main point was that the HS association would not allow players to play club soccer while participating in HS soccer. Her gripe was that she was never given a satisfactory reason why she couldn't go to important college showcases in Raleigh and Florida during the Arizona winter HS season.
I believe she stated that if she played soccer for her HS and wanted to play club basketball or volleyball at the same time, that was allowed. However, playing soccer in Florida during the two week period when there are no HS practices or games was stictly forbidden.
She asks the question at some point, "isn't it supposed to be all about the player"? If a player wants to do both, why not let them? She states that even though the competition and the level of player in HS varies, that she sees value in it. She also states that she is being punished and forced to miss valuable opportunities by not being allowed to go with her club team.