A common pattern in UI design is to create systems for everything - font sizes, padding, margins, radius etc…
While this is a better strategy that making it up as you go, it is not imperfect.
Nature is imperfect, yet it feels natural and beautiful. You won’t find precise systems of defined proportions in nature, yet it works.
Consistency is a quality of a great designer. Imperfection is a quality of a world-class designer.
The trick is having just the right amount of imperfection. Too much and it looks out of place. A little could feel beautiful, unconstrained and alive.
I still struggle with this concept in practice.