So you're saying the SAT gives a bigger advantage to people with resources to prepare, compared to a GPA which is the result of many assignments and tests acros

So you're saying the SAT gives a bigger advantage to people with resources to prepare, compared to a GPA which is the result of many assignments and tests across four years? That does not sound remotely plausible to me. SAT + grades is a stronger predictor of college performance than grades alone. AFAIK this is a pretty uncontroversial finding. For a review article, see Frey (2019), "What We Know, Are Still Getting Wrong, and Have Yet to Learn about the Relationships among the SAT, Intelligence and Achievement." [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6963451/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6963451/