It's one thing to say pogo sticks are off-topic in a unicycling forum, and quite another to say basic human drives (thought, sex, hunger, curiosity, creation, expression, socializing, prediction, story-telling, bonding, power, respect, exploration...) that pervade everything we do are "off-topic".
On the road to pathologizing and demonizing people who don't agree with us, this kind of compartmentalization is itself a mechanism we use to flatten and stereotype away the human needs, desires, and drives that animate others.
You may benefit HN (and society) more by acknowledging these entanglements and focusing instead on how to model, shape, and cultivate responsible civic discourse.