the feast test is not that hard and you do the test because you want to know, if you have the specific skills which air traffic controllers need.
if you train for it, you will pass it(maybe), but you don't know if you passed it because of your skills or because of your training.
Exactly. And then you only find out you're not for the job after 1-2 years of intensive training, wasting your own and everyone else's time as it turns out in many cases recently.
I think the FEAST test isn't easy, but the point is to test if you have the skills for the job. I know it's kinda difficult to understand from the "other side of the fence", but it is just the way it is.