I agree with you that it's not necessarily a good description of an average rank and file valley engineer, but there is obviously a large and visible founder/investor class that has some dubious libertarian-ish views and is very, very impressed with itself. It's odd that this point is anything but obvious.
For people who live as far West as you can be (politically), bordering the Pacific Ocean, who believe themselves to be at the forefront of a Science Fiction-esque reality that molds the world, this very-impressed ideology makes psychological sense.
Serenity, wealth, agency, and a pioneering spirit. These speak to vitality and placement. Sexual `fitness'... Winners... the psychology writes itself. It will likely be consistent as long as the four factors I've mentioned hold.
