In this video, he's talkin bout the difference between players who can improve their aim with a freek and who can't. Briefly, he concludes that it is whether they place their finger deeply on R3 stick or not as u can see 0:27. The former ones tend to get stability on aiming and be able to shot precisely even without a freek. Also he says that if you have large hands, you don't have to use a freek(idk but he said so, maybe cuz they can place their finger deeper without a freek?). sorry for my poor translating lol, actually you should place your finger deeply on R3!