Some of these guardless designs seem to be worshiped by those who think 'bushcraft' is one giant wood carving session, but have killed game animals of any real size animals only infrequently, if ever.
Fresh blood is about as slippery as motor oil. I tell people to do this: Go buy a whole, raw chicken, cover it liberally with olive oil, then, with olive oil all over your hands, take your 'bushcraft' knife and skin it, then butcher it. That's only a small animal that's already been gutted and cleaned.
Real 'bushcraft' is about sustainable living in the bush, and without the support of some form of agriculture, you simply don't do that without regularly killing animals for food.
I would have thought reindeer would qualify as large game. In fact, I am fairly sure the whole Scandi type knife styles such as the puukko, leuku, etc, were created specifically for working wood and skinning & butchering large game. Oh, and cleaning fish.
How regular is regularly? (for me twice a day, after coffee

)
Dick Proenneke lived off one sheep (as far as large game is concerned) for a whole winter in Alaska.
Processing large game is only a small part of a bushcraft knife's work.
I have skinned out a number of caribou & moose, and helped with a bear years back, and skinning is not all that bloody. In fact, I often wear lightweight, cheap, cotton knit gloves to make sure no gasoline traces on my hands taint the meat, and they only get an odd spattering of blood on them.
Butchering wild animals is bloodier, but its not like lathering up in olive oil.
I realy don't believe anyone is worshiping anything. It's just using what works best.
I am not saying it's wrong to have a guard, but it is by no means a requirement.
As Pict mentioned, a guard may be a good idea for children, or people who are not that experienced using knives.
I rarely ask modern hunters what they think is the best type of knife for them. Not that many are knife enthusiasts, and think that the Buck or Gerber they picked up at Wally World for $50 is the greatest thing in the world because that is what the bought and it worked. Nothing against those knives, I just find that some others perform better.