The appeal is that it’s exciting to them. This is like asking “Why do you like spinach? That’s ridiculous! I don’t like spinach” For some, the appeal is to the motorhead in them.. what it takes to make a car run at top performance for such a long period of time.. etc etc etc.. I used to ask the same question as you until I started watching it.. of course it’s still not my favorite sport by any means.. but I can certainly, now, see the appeal for some.