Its about assuming most people operate on dogma and heuristics. This is extremely true in my opinion.
By making this assumption, you dispel bad practices and behaviors that might have built up within an organization. Even more importantly you can reveal why certain chesterton’s fences exist.
It falls to pieces when people with this mindset attempt to work up against the constraints of physics, or other unchanging limits. Those limits can be constructed on, and relied upon. Going back to first principles in these cases inevitably results in massive losses in the repetition of the uncountable quiet failure-corners of history.
We will find out which one we are dealing with.