We're getting away from how to edit the photo but about the composition...I dunno, I don't mind the audience or the trees or the pool or the concrete being in the shot. Sometimes you need all of those markers in a photo to establish where you took the photo in the first place. And rather than photoshopping in things or photoshopping things out, I like to preserve the photo that's been taken...and restrict my editing to colour/brightness/contrast and a little cropping to make sure it looks nice.
You're taking a photo of the event...a moment in the life of your daughter. It's not just a diving photo...it has more meaning than that. 20 years from now, you want to be able to look at that photo, see that the trees are probably way taller now, recognize people in the crowd, recognize what event and where it was taken.
Sure, the diver is the focal point but sometimes, the rest of the photo doesn't need to be completely edited/cropped out. Take those spectacular diver only photos but don't forget these kind of photos as well.
Well, that's my 2 cents.