I am one of those people who don’t study and I have a 3.9 GPA in college rn. It’s because the way schools test is extremely conducive to people with good memory. I can hold on to all the necessary information until the test date and then I forget it afterwards. The only notes I take are writing down formulas for math classes, although I wish I kept more notes because I find myself needing math for personal projects, but after the class is finished, I don’t really remember how to do the stuff I was taught and then I have to go relearn it on my own…