It's a pretty important one, though. I have a Nexus 4 and if not for the big price difference and the fact that I wanted a phone without a contract, I would've gotten an iPhone instead. And one of the primary reasons is one-handed usability, because that is the primary use case for me. If I can comfortably use two hands, and if I want to, I'll use my tablet...

Based on observing people use their phones (as well as personal experience using mine), I think it's reasonable to say that one-handed operation is important for many people in various common usage situations.

E.g., I see huge numbers of people standing on the train using their phone with one hand (while hanging onto a strap with the other) or walking down the street, using their phone with one hand (while carrying a bag with the other), etc.

Have you considered being less patronising?