More of a security blanket than anything else.

Elk don't try to kill humans as a rule and bears are not dangerous at all until they are close enough to touch you. So the power of the bigger rifles is for my comfort. At spitting distance I like the idea of a 270 grain bullet at rifle speed better than a 150 grain bullet at rifle speed.

The 270 is very good for hunting.
The 375H&H is better if you are hunted.

More power feels better in my hands when I am around a lot of bears. Which I am----------- nearly every season.