For some jobs, your aptitude should matter. If a test has some discriminating power between people with aptitude and those without aptitude, then perhaps failing that test should really matter. For ATC staff perhaps OCD-adjacent traits are good and ADD-adjacent traits are bad. Maybe you don't want someone with epilepsy in ATC even though that's unfair.

Maybe we all want to be Olympic athletes and a few work hard to become so, but what should happen if we lack some necessary skill?