I think that's a very important point to make. To hear people talk about the one hole/two hole question, they seem to be thinking about it as if it was a bucket of blood, and if you poke one hole in it X-amount of blood will run out, poke two holes and 2-X will run out. It doesn't work like that. Inside an animal things move, slide, contract and expand. Shoot a hole in a muscle when it's relaxed and the hole will move when the muscle contracts, maybe stop any blood from running out. There is no guarantee the hole/path made as the ball travels through tissue will stay open, no matter how many holes you poke. I've also seen deer with one hole in them bleed more than ones with two holes.
Spence