Your confusion is predicated on your conflating "the tech community" with "makers." The tech community definitely has an idealistic streak. But it a small subset of the larger engineering world, which really does not. To the extent that you can ascribe an ideology to a profession, all those chemical engineers and civil engineers are not "hackers" or "painters" but rather "pyramid builders."
Your confusion is predicated on your glossing over that I said these makers, in direct reference to your statement about "the tech community" being idealists. And in the context of the tech community (as you framed it), the makers who are hackers/founders (as I framed it) are an even smaller subset of the tech community and thus the engineering community at large.
