According an official statement by the Cardboard Tube Fighting League (yes, its real) this sport was started based on three principles: people need more ways to play and take themselves less seriously, events can be fun without alcohol, and cardboard sword fighting is fun. The logic is impeccable.
Its probably one of the most painful single player sports out there, but hey, you can win a lot of money for those couple seconds of misery. But even if you don’t, pride is big in this industry. May the best (biggest?) man win.