And yet I don't know a single person who shoots entire High Power rifle matches from prone because that's how they'd do it in the Real World©®™, yo.
(Similarly, why not wait for the clay bird to land and blast it while it's sitting still? I mean, if I'm starving in the woods, sportsmanship isn't going to fill my pot. Gotta practice for the street.)
ETA: As she has a way of doing, my friend Kathy brings up an extremely valid point in comments that leaves me feeling a little ashamed of my early morning off-hand flippancy. I'll reproduce her comment here in the body of the post to make sure folks read it:
"It's a shame that the only way most people can practice important, life-saving skills like getting behind cover or slicing the pie, happens in a context where other people just want to play a fun game and enjoy it. It's rare to find a club where people are allowed to draw from concealment or move with a gun in hand outside the competition setting. So is it any wonder that people who want to practice those skills often end up shooting alongside people who are there to compete?.
I don't think either type of shooter should be insulting the other."