Okay. Let's try this. What if I told you that, as a college student, I have a 3.4 GPA, but I didn't study for any of my exams, go to extra help, make flashcards, go to review sessions, get a good night's sleep before the test. Not too shabby in the scheme of things, considering my laziness.
Then I ask you, what do you think I could expect if I started studying my ass off and doing all those other things?
Do you see yet why your question gives pause?