To other folks reading this: what you’re witnessing above is someone missing the joke.
Come back to this after considering other self deprecating jokes about activities told by people who participate in them. You’ll find they come from more leisurely sports like golf to more intense ones like marathons.
People find that humor can create a fun “in group” effect from the “why are we doing this absurd thing?” joking.
Come back to this after a couple months of sustained practice and maybe you'll have a different perspective.