I say that because many extraordinary things came from these incredibly smart but otherwise ordinary engineers. It reminds me of the quote from Steve Jobs about how once you realize all the stuff around you has been invented by people who are not that much smarter than you, it's very liberating.
I liked all the worrying and self-doubt that comes through in the book (especially since you know they pull most of it off eventually). There were daunting problems that they had to surmount one after another. They had to invent completely new ways of doing things: manufacturing, testing, materials, lubricants, etc... they were so far out in uncharted territory any one of those things could have been the end. But they pulled it all off not just once, but multiple times.
Talk about working the bleeding edge of technology, they basically built something from the future - theirs and ours - by inventing what they needed along the way.
Skunk Works is an incredibly engaging book. I devoured it in a few days and genuinely look forward to re-reading eventually.