Luigi wins by doing absolutely nothing.

Sorry but I can't really find this funny if it was set up. Like recording hours of gameplay only to compile 10 minutes out or if the game was edited to make the AI terribly stupid or it was an actual player pretending to be the CPU. In any case this seems totally unnatural.

Jeebus, who cares if it's staged or it took over 9000 hours? It's a set of fails achieved by doing absolutely nothing, and many people find it funny. Few people won't find it funny because it's not "real", and you happen to fall on that spectrum. It's like not finding Tool-Assisted Runs amusing because it's "staged" but can achieve incredibly hilarious results, vs Speed Runs which use no tools at all and just shows how fast one can clear a game with just human reflexes alone. Yes I'm complaining about complaining.