I'm not wrong and my reply wasn't in regard to ethics, only that a heart continues to beat after a headshot. Google Intrinsic Cardiac Nervous System if you don't believe me.
The same applies to commercial operations. Just because an animal has a large hole in its brain doesn't mean it becomes a ragdoll. There are many parts of internal organs still functioning for a brief period of time. The one we’re primarily focused on is the heart.
Because the heart keeps beating after a shot to the head, blood is still flowing for a short time before death. With a quick cut to a major artery or organ within seconds of the incapacitation shot, the heart will work to pump out most of the blood in the animal. Blood is the vehicle that carries oxygen to the brain, so without blood, what's left of the brain ceases to function. This combination of incapacitation and bleeding out is what ensures a quick, humane death.
https://www.themeateater.com/cook/butchering-and-processing/do-you-need-to-bleed-deer[/QUOTE
This isn’t the controlled environment of a commercial slaughterhouse here. The heart of a heart shot animal no longer is capable of pumping anything. The pump has a severe leak, even if it beats a few times it can’t drain the body’s muscles. A lung shot animal can fall, stand, walk or run. In all of these cases the heart is still pumping, effectively pushing all the body’s blood through the ruptured lung(s) and into the chest cavity. In the time spent observing the mortally wounded animal or possibly shooting again, then to alertly, slowly and cautiously walk perhaps 50-300 yards over rough, maybe broken ground while observing the downed animal to be sure it stays down, cautiously approaching and testing for immobility to prevent perhaps being injured by a thrashing animal, whoah! You’re now at the animal, it isn’t moving, appears dead. Only a fool tries to grab an animal before proving it to be completely dead and immobile, many hunters have been injured that way. Your heart is racing, mind alert, ready for instant action if required. All this has taken 5, 10, 15 minutes, maybe more, depending on distance, terrain, animal actions. So you think cutting the throat now will accomplish something? Not in the real world in the field. Yes, all this can be and is done in a slaughter house with a stunned and immobilized animal. We’re talking about real life hunting now, completely different as experienced hunters here will recognize.