I think this is true of any creative art, and it's simply something that we need to realize... and, we have to understand that it doesn't matter.
As a writer, I understand that there will likely be writers who are better at plot, or character, or grammar, or scene... writers who will sell more books than I will, who will get more money for their books, or who will be better-known than I will.
As a musician, I know that there are people with faster fingers, better understanding of how to read and write music, and with more expensive harps than mine.
As dancers, we need to remember that there will always be people who are "better" at certain things, or whom we admire.
But you also need to remember that all of these things are creative expressions of the self... and your SELF is totally unique, incomparable, totally special, and something everyone will love and enjoy seeing. You will never know anyone who is better at being you than you are. There is something that lives in you that deserves, longs, wishes, and requires to be heard... and you can give it to the world, through dancing.
You cannot be "behind" anyone, if you aren't competing with them. And, you aren't. Your journey is your own, your journey is exactly what it needs to be.