People find beauty in myriad ways. I think there's a certain beauty in pushing oneself to, and past, limits - both in the agony and anguish of failing to complete such an attempt (but not a failure to begin it....), and in the elation and meaningfulness of completing such an (inward and outward) journey. Spirit, endurance, will - beauty in it all.
It's too bad people think that you can only find/should only look for external beauty, there's lots of beauty inside each of us as well.
And yes, I even think some would find beauty in the fastest performance of Beethoven's 9th if done well - the technical prowess and ability to complete such a thing would be wonderful to some.
We all find beauty in different ways. It always makes me sigh a bit when we seemingly can't resist having to piss on someone else's parade because they see the world differently than we do. Tis a shame we can't simply appreciate the effort, even if we don't completely understand it or wouldn't be interested in doing it ourselves.