There really is no point doing this other than for its own sake. The whole game is about the journey, and a short sprint doesn’t really qualify.
Figuring out the fastest route through a game is one kind of a journey. There’s often big collaborative efforts involved in finding and perfecting the tricks necessary for the run. The actual journey is far longer than the resulting 10 minutes, and some people love being part of that journey.
I am of both sides. I play for the story and the choices and such, and take a long time to play… But then after I’ve seen everything, I like to dick around and see all the ways I can lose, and how fast I can get certain things or how early I can complete the game. For example, beating Chrono Trigger the normal way is cool and all; but have you ever defeated lavos the very first instance you can attempt it? It finishes the game super early, but it’s also the hardest challenge the game offers.