It makes no sense really, take any single payer game which has difficulty levels. If you go clear the game on easy mode and complain it was easy, well you picked easy so stfu?

Aby NMs are actually quite a bit harder if you do them without atmas and curor buffs, try it that way and enjoy your increased difficulty? Aby buffs aren't forced on you, you have to go pick your easy mode so whats the problem?