I think there is a difference between beauty and attraction.
I don't believe everyone is naturally beautiful (according to ever changing social standards of course). I know I am not.
However, I think everyone can be attractive, and that to me, is a quality that is more important than natural beauty, which whithers quickly in the larger scheme of things.
Attraction on the other hand is largely constructed. It's what you wear, how you speak, how you conduct yourself, your mannerisms, your micro-expressions, your tone of voice, your charms, your intelligence, your knowledge and culture, your confidence, your allure...etc.
And I think everyone can be attractive, if they put their minds into it (and still remain faithful to who they are, evidently), to the point where it becomes second nature.