Why do high schools in Iowa play their softball season during the day over summer break?

I think it's totally ridiculous. They play from the time summer break starts until middle of July then start school second week of August. And, they don't want you take vacation during softball season. When are you supposed to enjoy your summer break? Does anyone know why they do this?|||They want to prepare you for life in the real world. When you won't get the Summer off.|||They don't want to interfere with academics.