I don't think the author meant "technically privileged" as "those unfairly given an advantage for whatever reason". To me, it read more as, "folks who grew up immersed in this stuff" vs "folks who come to it later in life". I started coding in high school, and I think I approach it very differently than people who never wrote a line of anything until sometime in college or later. It strikes me as a legit difference, not one to bemoan as unjust but worth pointing out to people just getting started who might be intimidated.