"Y'all are lead by the nose and you don't even know it."
I think you're missing the point. For roughly 99% of these kids, it's their last hurrah...kids at near-peaks of their athleticism and skills. And as KWRX25 pointed out, there are few sources of energy more powerful than an entire student body aimed at one goal. Not to mention...that sound, from the crowd on a buzzer-beater, is like no other. I think the NCAA tournaments are a joy to watch.
Also, I'm always stuck at my desk the whole time, so it's a great diversion for a week or two!
Side tale: 25 years back I had to tape WS Game 7 in Arizona, and had the TV running live while I did (old, old VCR tech). I closed the door so I couldn't hear anything, or so I thought. Later that evening I was walking past, and even at a low volume, heard the unmistakable sound of a stadium that had just won the World Series.
Spoiler Alert!
"Which month is heterosexual pride month?"
Every month they show beer commercials on television.
So ... only the months when sports events are held.