I've never really understood why at every stage of training there's an emphasis on the prestige of the last institution you attended. Medical schools care about where you went to college. Why? Where I went to college is a reflection, at best, of what I did in high school. So, my high school GPA and ACT score. Plus, the only people I know who went to those fancy schools had lots of family connections or came from huge wealth. Then residencies care about where you went to medical school. Why? That's mostly a reflection of my college GPA and MCAT, neither of which I even remember. I couldn't care less about what someone did in college, I care about what they did in medical school. Then fellowships care about where you did residency. This makes more sense, but again - what determines where you go to residency? Step 1, clinical grades, where you went to medical school, etc. Does this really have much bearing at all on how you perform as a resident? Is someone who goes to a university program a better physician than someone who goes to a community program? I certainly don't think so, maybe they have more access to research but that's it. To be clear, I'm extremely happy with every single place I've ended up, from college to residency. But once you really see how a lot of the sausage is made it's a bit odd.
Well, that would be true if how you did in high school 100% determined where you go for college and where you go to college 100% determines where you go to med school and vice versa. That's not true. Sure, there is an effect. Maybe even a really strong one. But at each level, you're given the chance to work your ass off to get to the next level during your next level of training. Someone who never realized that they should work hard in HS and realizes that in college can work their ass off and get into a top med school. It gets harder at each level because the further you rise in your training, the more opportunities you will have had to distinguish yourself. Advantage builds on advantage. You working hard and spending those hours in the research lab in college doesn't just go away. Your papers stay with you forever. Your connections stay with you forever.