But the difference with those sports are there's more rules. You have to dribble in basketball, and you have defenders. You have plays, and strategies. What strategy do you have in disk golf? Try to hit the pole with the frisbee? I mean yes, when you look at ANY sport you can break it down into what the most basic concept is, but with disk golf, there is nothing past the basic concept. It doesn't get anymore complicated than "throw the frisbee at the pole".
And yes I ignored golf because...well it's boring. But Golf is supposed to be a relaxing game so it could probably be in the same category as disk golf.