I completely agree with this sentiment. I think this blog post mostly described the characteristics of a skeptic, and many "smart" people are skeptics. However, I don't necessarily correlate skeptics with getting lots of things done, like Steve Jobs did.

Ideally, there is some balance between making assumptions and asking questions that leads to great leadership and innovation. I think this balance occurs when one questions everything within a certain domain they wish to control (for instance, Apple and how people interact with computers), but then just accepts the common views for topics outside of their domain.