Maybe decades ago when nobody prepared for these tests and they were kind of new.
Now theyre simply tests that measure how good you are at test taking and how well you have prepared for the SAT or whatever.
I have heard of rich kids that literally take off a year to go through this course several times:
https://www.kaptest.com/sat
Imagine having a private SAT tutor too, some people do it. Somebody like that would probably do better than a legit smart guy whos taking the test for the first time and has to work a part time job too.