Imperfection is the true perfection.

Ever heard of fake diamonds? That they're not valuable?...... That they're perfect?
Maybe your question is "Why is something perfect not as valuable as the imperfect ones?"
Then have you read books with a "Mary Sue" in them? The type of character who is "perfect", plain and has no imperfection at all. I bet you've thought that they lacked character, or thought that the writer was quite shallow.
It's the same with people.
Let's say imperfection is a roller-coaster with equal ups and downs, while perfection is a straight roller-coaster.
Who'd pay to ride the straight one? Would it even move?
Would it?