I think the point people are trying to make is that you can't just learn things like spatial awareness - people have a natural ability (or inability), although that may be able to be enhanced. Sure, you can learn the way spatial awareness questions are asked, but it's not your natural ability that's showing through.
Even if you get to college and you learn "ATC stuff", some of what you need just can't be learnt - you're either good at it or not, and you have to accept that is the case with ATC. The understanding at the moment is that these FEAST tests provide an indication of your brain's natural abilities and whether they are suited to the requirements of ATC.
If ATC was just about who could learn more, study harder, etc, it'd be a lot easier than it is!!!