Perhaps you speak for some, but there are certainly players out there who don’t have to just “kill Bad Guys” and call it a day.
Sometimes we have to pick between “Bad Guys” as the lesser of two evils… for the moment. Sometimes we have to barter with “bad guys.” Sometimes those guys aren’t so bad - or sometimes, we find aspects of the bad that can be used for good.
You can have a closed off perspective, but I disagree. I think learning about different facets of our old enemies highlights what little we understood, as far as Mortals in a Cosmic Game.
Outright making them Jabronis to stomp on is pacifying them.
We can learn about new facets of the Fel and the Void to work with, just as we can learn about new facets of the Light and Life to face off against.