He was the guy who thought that people were too dumb to operate a two-button mouse. It's not that the networks conspired to dumb us down, and it's not that people want something exactly this dumb, but it's that those folks in control at the networks, much like Jobs himself, tend to make systematic errors such as believing themselves to be higher above the masses than is actually the case. Sometimes that helps to counter the invalid belief that people will really want to waste a lot of effort on your creation.
He was the guy who thought that people were too dumb to operate a two-button mouse.
Did he say this, or are you inferring it from his having designed a one-button mouse?
Having two incorrect beliefs that counter each other (thinking that people want to spend time on your creation but are less intelligent than they actually are) could result in good designs, but so could making neither mistake. I'd expect any decent UI designer to understand that the user shouldn't need to pay attention to the design, and/or that users will sometimes be tired, impatient or distracted even if they're not stupid.
Here's the new thread for posting quotes, with the usual rules: