Summer try outs, and work

I'm really annoyed at J's summer try out sked (for b-ball and volleyball) or more specifically, the coaches that set them up in the first place. All of them have the so convenient hours of 9-12 or 2-4 or my all time fav, 9-10:30 am. Okay, since I do have to show up at work sometime during the summer, I have to ask, do these coaches really expect at least one stay at home parent in the household?