Let me stop you here and add a couple points:
1. Good college performance is all well and good but it’s only loosely correlated with medical school performance. Med school is harder but it’s focused. People who struggled in undergrad with subjects they weren’t interested in can be very successful medical students, because there’s no history or basket weaving.
2. I am not aware of any evidence to suggest that undergrad GPA, medical school GPA, or USMLE Scores are meaningful predictors of one’s future patient outcomes or technical skills. If you have some, please provide it because I would be really interested in reading it.
3. Failure/attrition once the hurdle of gaining admission to US MD schools is very rare. At my school the latest numbers were <2% of students not succeeding in 5 years, which accounts for research year students. As
@Goro can likely corroborate, the leading cause of this is mental health issues, not academic inadequacy. Your claim that students who have lower GPAs going in are likely to fail simply isn’t accurate. The threshold of academic metrics is well higher than is required to successfully complete medical school. US MD schools don’t need to take people whose numbers indicate they may not succeed.
4. Who are you to discourage anyone from going into medicine? You are not a doctor, in medical school administration, or even accepted to a medical school at this point. You have no experience in medical education other than your own application process and no business telling anyone else what to do. I can’t tell if your attitude is to protect the world from the poor quality doctor you think comes from someone with a lower GPA, or if you’re just convincing yourself that numbers are the reason you haven’t had your own success. There is simply more to it than that, and you lack the perspective that it takes to see that once you’re in it really doesn’t matter.