Jim Dixon's post reminds me of a proverb my father was fond of quoting. If I recall correctly, he said it was a Russian proverb, and it had been invoked during those testy times we had, working out the S.A.L.T. Treaties:

"Don't let the perfect stand in the way of the good."

And, in respons to Celtaddict, I even think that perfection is a false ideal.

Many, many years ago, I was taking a freshmen course in Philosophy, and our professor raised this question that often troubled her: "I have dyslexia and vision problems; if God is perfect, why did He make me imperfect?"

That very question bothered me, but I couldn't put my finger on why, or articulate it in class, but hours later, as I was getting ready for bed, the answer came to me: "God did make you 'perfect'. You may not be a perfect human in the abstract, but you are a perfect 'Kate Lindeman'. No one can be better at being you than you can. And your dyslexia and vision problems (and other quirks of your personal history) give you a unique perspective to solve problems and teach students in a way that no one else can, either."

And the same is true of teacups and blankets, and dresses, and houses. The slight 'imperfections' help establish a relationship between the maker and the object, and the future people to use that object, and without those relationships, the object loses much of its meaning and value.