I never understood the obsession with inbox zero. I treat my inbox like the HN front page. If a headline catches my eye, I click on it. Otherwise, it falls off

I never understood the obsession with inbox zero. I treat my inbox like the HN front page. If a headline catches my eye, I click on it. Otherwise, it falls off and disappears and I forget about it. I suppose for people whose job is replying to emails, I can see how a tidy inbox would be advantageous. But for the rest of us, why?