And it's still massively more of a deal for spectators then academic sport in, say, the UK.
I spent a term as an exchange student at the Catholic University of America, a smallish university with a completely unexceptional D3 football programme staffed with actual students. And they got two thousand people to their football games! Much of the campus! Alumni! People who lived in Brookland and fancied some live sport!
I mean, I knew how seriously people take high school football too. But even really good UK university sport can play to an audience of the players supportive romantic partners only. A different (and quite refreshing) world.