Polar bears were mentioned mostly for completeness, grizzly bears barely have less health, and still have plenty of damage.
Also the issue isn't when you notice they're there or have a trap or a ton of spears prepared.
It's when you aren't paying attention and the bear notices you, basically guaranteeing a death.
The literal monsters don't do that, and bears are more common most of the time!
And while you can weaken them with settings, or make them passive, this effects all the other enemies too, which are still weaker than the bear!
I don't want combat to be easier, I want a creature that commonly spawns on the surface to not be the strongest in the game.