Why is leaving after five the way one demonstrates caring about the business/product/team? Why isn't it just as plausible to say: "I care about the business/product/team, which is why I leave at 5 every day, or shortly thereafter---after all, I want to be refreshed for the following day's work, and don't want to resent time demands the business places on me, etc."? The idea that if I give a shit about something of course I'll spend a bunch of extra time on it and devalue everything else is pernicious. Even a model employee can leave at five.