Difficulty scaling is done to such an extent that even common enemies scale right along with you. In the opening scene, there is a bear you come across and at level 1 or 2, you are able to one shot it. Then the story takes you on a grand quest where ostensibly you go from a nobody to the savior of the world. However, due to difficulty scaling, if you run into the same bear halfway through the game, it will be harder to kill than when you were level 1.

That’s just how all Diablo clones work; basically consider it asset reuse…

Power fantasy during leveling / campaigning always comes from being “ahead of the curve” gear/build wise — the subject of your combat is rarely meaningful