I love active sports. Mountain biking mostly. But I don't follow professional sports.
I've never understood it. I've never been able to sort out how some can burn their bodies down past fitness, way beyond, and into ruin -- all the while risking serious injury -- and all on a bet that their bodies will withstand the abuse long enough to secure their financial future.
...this, I've learned, also applies to ballet dancers.
I guess the love for whatever involved is worth the risk. Don't know if horses get much choice, but they still serve as a decent sports metaphors.