The only skill you gain while cramming for the SAT is how to cram for tests like the SAT. The gameability of the SAT is not an indication of general scholastic aptitude
If general scholastic aptitude measured something other than how to study for tests and write essays, then you might be onto something, except that college is simply more of the same.
I always wonder where people get this view of college (the GP's view that is). I went to a non-name state school for undergrad and it was nothing like the above.