I agree with this. We (IT people) are so self-centred that it hurts. :) We do "everything" - we "entertain" ourselves with new approaches, frameworks, management ideas - except actually "talking" to and "knowing" our users, their life ands true needs.
It's particularly sad, at least for me, to see UX also being "shaped" like this. We can get essay-like posts on building an icon family, yet it's hard to find good content regarding how company X got to know their users and build what they really wanted.