Start-ups are foundationaly bullshit. It's almost always some person with some type of observation and a relative level of blind faith for an idea or system that MAY work. Worse than that, almost every major breakthrough or improvement ends up looking completely different than the original hypothesis immediately rendering the original confidence as bullshit. We just apply genius historically.
In the end startups seem to be a confidence game where a group or person basically need to survive long enough for a point on their series of experiments to work and their bullshit to be "prescient."
My observation on tech and engineering is the disdain for bullshit is a clumsy hatred for the uncertain nature of social exchange amongst people. The rules are very different than the absolute predictability of systems like math and logic and that makes people uncomfortable and angry.