Before understanding the poem understand yourself. It is most important that you know yourself. As you say no body is perfect means you are not perfect. First make yourself perfect. find out what is wrong with you. It is you who create your own life. don't look others that they will make you perfect. It is you. Your life is in your hand. No body can push you to become this or that. It is up to you. Just build up yourself with right people and you will get your self perfect as others who are perfect. I welcome you all the time to share our thoughts. Enjoy the day ...
I feel like everyone has their flaws. This only makes us human, we're not perfect but accepting these flaws can make you live a happy life. Saying nobody is perfect is not necessarily trying to bring anyone down, identify your flaws, work towards improving and playing by your strengths. At the end it's a win