What! A 2nd tier school still has strong peers which you can surround yourself in. If you're at the top of a 2nd tier school you can push yourself to be near the PHD researchers and graduate students giving you similar academic peer rigor.
I agree with you from an academic standpoint! Maybe my comment was too harsh, I think surrounding yourself with PHD researchers and graduate students counts as challenging and pushing yourself.
But it's more fun when the people pushing you are your friends and peers. In contrast, how many PHD researchers with a spouse and kids want to study and get coffee with a 19 year old undergrad?