I didn't mean to suggest this phenomena was unique to tech people--that's just the limit of my experience. I don't have enough data, anecdotal or otherwise, to comment on other fields of employment. So limiting my statement to technical people is purely a function of my limited knowledge of the workforce. I'm sure you're correct that people in many other fields feel the same way.
Graham also limits himself to tech people because that's who he's talking about in his essay. I should also clarify that I don't consider myself one of the "super-hackers" he refers to--although I wish I was one. :)