I can see where you are coming from, hunting with dogs is a different game totally. Stalking kodiaks or grizzlies is where the shoulder shot is warranted. Also most people do not want to destroy the skull with a head shot but that is certainly understandable if life and limb comes into play.
If I ever got into hunting big bear, I would probably use a 375 H&H. Holland and Holland (ironically a family name of mine) did extensive work with the 375 cartridge to increase case extractability in extreme climates which is something that the straight cased/heavily flared modern magnum cases lack.
fine weapons. https://en.wikipedia.org/wiki/Holland_&_Holland
my dad din't hunt bear with his Holland & Hollands, but did some African animals. Holland & Holland... .450 double barrel... and .577 nitro express... double! elephant guns.