90% is good enough. The time it takes to try to fill that gap between 90% perfect and actual perfection is a waste and nobody notices the difference between 90% and 100% perfect.
Why chase perfection when it's imperfect to spend 90% of the time fixing that last 10% of "perfectness"?
In that time, you could make 9x more things at 90% quality and produce 900% worth of quality cumulatively instead of just one product at 100% worth of quality.
Wasting that kind of time and effort is imperfect in itself. So what exactly are you chasing?
I have the theory that you'll never achieve perfection this side of heaven. Don't let perfect be the enemy of good enough.