Psycology as a recruiting device

Even though I believe that Psycology as a "pseudo-science" could be useful to address a wide variety of phenomena, I kind of look down on its use as a recruiting device. If you think about how it is loosely applied at job interviews, you will understand what I mean. How can a test that was "dubiously" proved to "statistically" work in a certain environment/culture, be taken to decide who should be taken on/rejected for a certain position? In my view, the statistical nature of those tests make them questionable in that you are deciding how appropiate someone is by just resorting to "findings" that work on average.