That's what a community is: taking for granted certain assumptions, not having to start from zero every time. This is no longer true.
Nietzsche's vision of the superman is of someone who's able to control and tame his passions and turn them into something richer than raw emotion and raw feeling. I think the best writing does that too. Untamed passion basically results in bad writing or bad polemics, which so many writers and public intellectuals are vulnerable to.