Gosh Amy, I don't know what to say about this. I'm a fan, we've met before. In fact, I remember eating pizza together in Miami during Superconf I think...but I can't agree with you here.
I guess I'm one that you could say has delusions of grandeur, and I think it's the greatest gift I've ever been given. You'll never hear me say I want to change the world, but I do want to change my world, and I, like many, have lofty ambitions and am not ashamed of that fact.
I also don't think it's fair to conflate ambition with false confidence. In fact, I'd argue that increased confidence leads to increased ambition.
What's really wrong with a constant raising of stakes if that's what you're into?