A couple thoughts come to mind:
1) When pontificating about a major exam, people should include whether or not they have actually taken said exam in their post. I feel like a lot of the Step 1 advice comes from people who haven't even taken it yet, which makes about as much sense as me (MS4) trying to give advice to graduating residents on their upcoming specialty boards.
2) I've never met anyone who scored highly on step 1 argue that learning the material well for classes was not important. There seems to be a false dichotomy that says you can EITHER do well in classes OR do well on Step 1. You can either spend your Ms2 year pouring over FA, World, Goljian, Pathoma, et al, OR you can spend it studying class notes, Robbins, etc. This would be true if classes and steps tested entirely different material, but the reality is that they actually do test the same stuff. This is true regardless of whether you feel your school "teaches to the boards" or not; just because your exams have a handful of PhD minutiae questions does not mean that your school doesn't teach the same material. Those of us who have taken Step 1 can attest that there are definitely a number of minutiae questions on that exam too!
The key factor which throws people on Step exams and shelf exams is the apparent ambiguity in so many of the questions. The writers have taken great pains to create questions that require you to reason based on your accumulated knowledge base. These are often the questions people will describe as "there was no way I could have studied for that." These are the questions that leave people feeling defeated as they leave the testing center. These are the questions that force you to integrate across every source you've ever read, especially your classwork when you learned the concepts initially. Neither memorizing Robbins nor memorizing FA/W/P will be enough; you have to truly learn and incorporate all the material you can to the point where you start to see and understand the underlying patterns of path, pharm, physio, etc. They are going to ask you about things you've never seen or studied before and expect you to reason the answer based on the broader patterns you've learned.