Jim:

You're picking nits IMO.

Would you rather get stuck with a 2" knife in the chest.......all the way through to your back bone? Or......a 1" knife all the way through?

Either way.....you're bleeding. Except with the 2" gash.......you're bleeding 2X as much. The body cavity os NOT going to stop the blood from leaving the cut vessels......and that deer's gonna bleed out twice as fast.

Of course.......everyone ALWAYS gets pass-thrus, too, right?

Edit**

I just thought of something else......

NEVER have I (on a non-pass-thru shot) NOT found my arrow (or a piece of it) along the blood trail. I've never seen one do it, personally....but my guess is they pull it out with their mouths.....or bust it off on a tree. Still....I've never found one still in a deer. I've seen photos of them....and I've seen them on TV with the arrow still in them So I know it occurs)....but I've never personally witnessed it.