The issue is schools focus primarily on two sports-football and basketball. Those are the big money earners in regards to both scouting from universities and ticket sales. Sports like soccer, tennis, vollyball, etc are often overlooked as they just don't interest people as much.

The other issue is injuries. We know how much it costs in terms of harmful injuries and both short and long-term medical care. Football's one of the most dangerous activities a kid can take part in.

As far as arts, theater, music, and other programs those are getting phased out more and more as they cost far more than they bring in. Schools aren't about educating kids. They're about training kids to be money-earners which is why only the programs and activities that bring their schools the most money end up sticking around.

Schools aren't there to educate for the benefit of society. They came about as a means for the wealthy elite to foster a working class for them to exploit. This is why the best colleges are more often than not restricted to those with wealth and influence and why we're not seeing the wealthy in a hurry to implement actual, beneficial free education (and I don't just mean college-it costs a lot of money to send kids to good schools, period).