I think the point all of the professors are trying to make is that Sketchy micro, first aid, etc. board review material is review. You need to learn it all the first time or you don't have anything to "funnel down" so to speak. You'd be surprised how much those "tie in" details can matter. As someone further along now in training, I can tell you that I have remembered things for years much better than my colleagues because I didn't just binge and purge on review materials as my main source of studying. I also have several friends who have experienced the same on both sides of the spectrum now that we are out practicing and shockingly a lot of the material doesn't go away. Sure, there is dumb minutiae that doesn't matter clinically, but a lot more shows up than you think and makes studying for subsequent boards, inservices, etc. much easier because it doesn't have to keep being "re-learned." There's no substitute for learning the breadth of the material the first time. Now, if you don't have time or don't want to...that's a different issue.