For perfection to exist you need to set parameters for perfection. A score of 300 is a "perfect game" in bowling for example. A "perfect game" in baseball is not letting any batter reach a base for at least 9 innings. A "perfect week" is having sex with 7 women in 7 days without a single rejection. These are all defined terms of perfection that exist and are entirely obtainable. Now it is possible to do things perfectly like tests, classes, sports, etc. However, perfection isn't and can't be a defined term for people to reach. People try to make a definition for perfect outward appearance but that is impossible as beauty varies from each culture.
tl;dr: You can do things perfectly, just not be perfect.
tl;dr: You can do things perfectly, just not be perfect.