https://www.cnbc.com/2019/10/03/rich-students-get-better-sat...
If if just getting a better education gives you a better score on the SAT then that is a "problem" impossible to fix. However, teaching kids tips and tricks to do better on the SAT would have minimal effect on their actual intelligence. That right there is the main problem: Preparing for the SAT has no substantial increase in intelligence but does make it seem like you do.
I don't have much time when I'm writing this so if your confused by something just ask
Do you have a citation for the causation that you seem to strongly imply?
More importantly, why use the SAT when your highschool grades are more accurate? This is what I'm really annoyed about! Why put everyone though a stressful test when your grades are more accurate?
https://edpolicyinca.org/publications/predicting-college-suc...
https://www.forbes.com/sites/prestoncooper2/2018/06/11/what-...
No, just that's a marginal side effect. The whole point of standardized testing is the "standardized" part - to provide a common metric upon which to base large scale institutional decisions.
The edge cases (and also the large biases in the system) are handled by other criteria, like weighing other aspects of a candidate's background against their academic performance.
I expect a lot of people will anyway, if the test scores are good.