Hard Truths from Soft Cats opines that
Your flaws don't make you beautiful or unique. They make you flawed.
While I agree re beauty, technically, your flaws actually do make you unique: the number of ways in which one can be flawed is vastly larger than the number of ways in which one can be perfect; the probability that someone else would turn out to be damaged in exactly the same way you are, is negligible.
It's just that uniqueness is overrated.