NBA crowds aren't loud enough

Have you ever watched a March Madness game? Even if it's two smaller schools, the energy is always electric. Fans going crazy over everything. That's what makes March Madness so special to watch. The passion and love the fans have for their team and the game itself, you just don't get that in the NBA. Now don't get me wrong, there are loud, rowdy crowds, but it don't have shit on college hoops. Maybe it's because big NBA games are so expensive that only rich folk who don't really care about the game can attend. Idk. But imo, NBA crowds need to be louder and more passionate.