I think it can actually mean something. Often times you'll get folks who aren't used to the pace of startups. They think they're coming into a nice cushy gig. Startups are cut throat. Some folks just aren't cut out for that. They'd be better off going to work for Google or Apple.
It's possible to be basically nice (firm, strong in your dealings, smart, deal-making, but nice all the same). Instead of being an archetypal asshole.
p.s. I recoil at the term "culture-fit", shivers down the spine. You make some valid points.