The age old question becomes where/how are things most likely to go wrong.He also recognizes not all people always make the perfect shots. Human.
We all screw up. Miss by enough and all's fine other than the lack of a punched tag. Miss back and the deer's gonna die (but might be a challenge to track) miss forward and the shoulder comes into play, with more chances for the deer to survive.
Heavy tackle increases the chance to turn a survivable hit into a harvest. Expandables might improve recovery odds (and time) of fatal bad hits further back. We should all be planning for our own failures when we set up our bows. If things go right there's not gonna be a problem either way.