1. "Just memorizing a few facts"--this is not what the MCAT is about. The MCAT (and Step 1) are about applying what you've learned. It's a critical thinking test, just like the ACT. The SAT is more memorization. The MCAT is more akin to the ACT.
2. Medicine is a lifelong learning profession. You will be tested routinely: Step 1, Step 2, Step 3, board certification, board re-certification (every year), reqs for board certification, etc. etc. etc. If are not the type of person who enjoys picking up a book and learning it BACKWARDS AND FORWARDS, then you will not succeed as a doctor.
3. "Learn everything to the best of your ability"--I don't disagree with this, but you need to be able to push yourself. Just going through the motions is not going to make the cutoff.
Sorry to be harsh but that's the way it is.