The things you learn from sports - setting goals, being part of a team, confidence - that's invaluable. It's not about trophies and ribbons. It's about being on time for practice, accepting challenges and being fearful of the elements.
I don't think we need a critic to negotiate with the audience. People say, "Who are you writing for?" I'm writing for myself but my audience is anybody who knows how to read. I think a story should engage anybody who knows how to read. And I hope that my stories do, maybe on a different level for more sophisticated readers than, say, a high school kid, but still a story has got to grab you. That's why we read it.