Straightforward: Do you think the SAT and high school GPA are excellent metrics (note that I'm not asking are they decent metrics that measure something, I'm as

Straightforward: Do you think the SAT and high school GPA are excellent metrics (note that I'm not asking are they decent metrics that measure something, I'm asking do you believe they are excellent metrics)? It seems to me that the SAT is a gameable system and that some groups (people who are wealthy, people inclined to spend money on education) are more likely to spend money on the types of things that help them game the system (SAT courses that guarantee certain score improvements because they teach the student how to game the system). If one group has less money they are less able to game the system. Or if you are from a less affluent family that doesn't even realize there are New England, SV, NYC & LA parents paying for multi-thousand dollar SAT prep courses that your child is competing with. And high school grades are subjective evaluations, often from mediocre teachers, that are likely to themselves be subject to bias because the subjective evaluators have many of the same biases as the culture at large.