Back to potentially serious conversation...
@Garf , you mention a couple of other puzzle genre's on your original post. Those only have one way to approach and answer. There are jigsaw puzzle solving competitions for the same reason that there are twisty puzzle competitions, there are multiple ways to approach the solution. Whether it be a researched speed solving technique or a personal preference approach that just works for you, there are many different ways to approach this puzzle. I doubt that Mr. Erno Rubik ever imagined the twisty puzzle community becoming as large as it has, but he has to be proud of himself for being the first person to ever solve the damn 3x3, even if it wasn't the best approach. At the time, his approach was the most logical and straight-forward way that he had developed, and look what it led to; an entire culture of people always searching for the next best way. This puzzle is forever improvable, if for no other person than the one solving it. That's why the speed solving community has grown so easily, quickly, and interestingly. Everyone has room to improve. The twisty puzzle community overall is a completely different build (pun intended). The basic idea of the 3x3 has been transformed into so many incredible puzzles that likely would never have existed without Mr. Rubik's randomly created for a geometry type class puzzle. This world can, and will, continue to grow because there are so many shapes and so many ways to turn them!
Don't be afraid to step away from your comfort zone, folks. The WCA speed stuff is great, but there are so many more things that this simple (now that we can solve it) puzzle has led us to!