Aussie, far be it from me to pass judgment on where other's draw lines. There are more than a few animals I'd never shoot. That's a personal thing and needs no explanation.
To me a buffalo "hunt" is really a "meat shoot" which is why they should be head shot. Saves meat and puts them down dead asap just like a cow. My Grandad had a slaughter house and as a kid, before it was made illegal, we'd use a Sears single shot 22 to put down cows for slaughter. I see Bison exactly as I see cows and definitely don't see them as a game animal per se.
