Nature is perfect and yet, perfection itself is unnatural.
Kind of strange :-)
Perfection is a tricky subject.
If used as means of motivation to do better, it is priceless. However oftentimes, the stress of trying to achieve perfection can take away the sense of achievement and pleasure in a well done fun activity. In the worst case, a person is can give up because perfection is unachievable and anything else is not good enough.
Agreed that 100% is better than 99% but if all the way is impossible to reach even half way through is better than not attempting.
(Otherwise none of us would have cleared our school and college, we'd be forever stuck in some grade trying to achieve the perfect scores!)