Just because a sport is on this list doesn't mean anyone thinks it doesn't require skill or hard work. It doesn't mean that sport's athletes aren't highly trained and dedicated individuals.
All it means is this: the sport is weird.
Weirdness in this context doesn't mean underwater basket-weaving, or professional snuff-stuffing (unfortunately). This is the Olympics, after all. Every sport, to a pretty large degree, is pretty widely practiced, universal and easy to understand. That's kind of the point of the Olympics.
And yet, weirdos are gonna weirdo. I should know. Whether it's because of the rules or the objectives or because they're simply visually jarring to watch, these are the weirdest sports on the official docket for Rio.