This.
People have this ludicrous idea that you can just coast and get Bs and Cs and then crush your boards with UFAP + sketchy. Nah. Step 1 doesn’t test UFAP and sketchy. It tests what you learned during the first two years of med school. UFAP/S are great for training your mind to apply that info to the test, but they will not teach you the medicine that you should have learned, and that will be tested.
I pretty much poured my soul into years 1+2. I put my faith in the curriculum. I obsessively hoarded the contents of my lectures in my head. I thought about concepts critically and talked about it with friends. I didn’t always get As, but I did get them more often than not. I actually didn’t touch UFAP until dedicated. When test time came, I had a ton of questions that were nowhere in UFAP... but which I remembered learning in class. I ended up with a score I’m pretty proud of.