The same way we know its doing anything correctly, reviewing its work and prealigning guidelines. Make sure you click the submit button yourself.

arguably the job application process is automated and staffed by the ignorant to such a degree that it's an adversarial game where you don't need to be optimising for correctness. Which is the perfect tool to be mass spamming job ads with

Edit: I think this is a reasonable solution because the hurdles and context-free nonsensical rejections you'll face if you interact with this process in good faith are far too high. It's dehumanising.