In short, employers have some degree of power over you, and if you perceive people who wield power over you as wielding that power arbitrarily, that is nearly universally experienced as frustrating.
In GP's case, the arbitrariness originates from their potential employer not taking the effort to really evaluate GP's relevant skills in software engineering, but instead resorting to lazily ticking boxes on a checklist. And what's on the checklist isn't even particularly relevant.
What I imagine this does to GP's view of the world (based on what it would do to mine) is: "I believe I am competent because I've built up a set of subtle skills in software engineering over many years, and this is what I take pride in. But from an employment point of view, this is wasted time: I should instead have focused on optimizing the checklist (and I only found this out after years in the industry)."
In GP's case, the arbitrariness originates from their potential employer not taking the effort to really evaluate GP's relevant skills in software engineering, but instead resorting to lazily ticking boxes on a checklist. And what's on the checklist isn't even particularly relevant.
What I imagine this does to GP's view of the world (based on what it would do to mine) is: "I believe I am competent because I've built up a set of subtle skills in software engineering over many years, and this is what I take pride in. But from an employment point of view, this is wasted time: I should instead have focused on optimizing the checklist (and I only found this out after years in the industry)."