Elevation has very little to do with rebounding.
This is true to some extent, but being athletic helps on get the ball. A guy who can jump higher as an edge. Boxing out and attitude are just as important.
But only guys who can't jump or short guys say stuff like elevation does not matter. Of course, it can factor into rebounding, height is elevation and a lot of tall guys can rebound better than shorter ones is the mindset is equal. Being able to jump high is not the end all but it helps. Speed helps get you to the ball. Timing and good hands, knowing shot trajectories helps and tendencies of shooters helps a ton too. Will to rebound is very important and came overcome physical deficits.