Why does it have to be predictive? What's wrong with its being merely a descriptive tool? I agree that it should not be used as a basis for decision-making, but

Why does it have to be predictive? What's wrong with its being merely a descriptive tool? I agree that it should not be used as a basis for decision-making, but dismissing it as useless seems a little extreme. Granted, I have consistently scored the same over several years, although I think even variable, time-capsuled iterations can be helpful as a way to observe one's personal change over time. Of course, I suppose the problems arise when an employer administers the test just once (especially when that happens with new employees).