I just don't think you get much of the positive aspects of the hidden curriculum in MS-1 and MS-2. I mean, I've been stressed a great deal by block weeks and a few of the other borderline insane stressors of med school, but it doesn't really hold a candle to the times when I was the only RT available on the ICU, dealing with 3 patients that were trying to code at once, trying to split my time and hope that none of them would up and die because I chose to spend my time with the wrong one. Or the pain of dealing with the withdrawal of care of a patient I'd grown quite attached to over the months and years. Or having a young parent die of the swine flu in less than a day despite all our efforts to stop it. Nor will it teach you how to deal with irate family that hate you and your team for what "you" did to their loved one, despite the fact that you didn't give them their disease, you just tried to stop it. Nothing, and I really mean nothing, in preclinical can do a damn thing to prepare you for that sort of ****.
But I agree there are certain aspects of it that you probably get in the clinical years and on into residency that are beneficial. Still, I question how much of the bad is coming with the good.