Like the rest of the genetic lottery, beauty is unfair. Everyone falls short of perfection, but some are luckier than others. Real confidence requires self-knowledge, which includes recognizing one's shortcomings as well as one's strengths.
The only lottery I've ever won was a
100 scratch-off card at age 16, and the 7-Eleven clerk who sold it to me said I was too young to claim my winnings.