You don't need attributes, races, feats, skill proficiencies, dungeons, dragons, wizards, clerics ... the list goes on. We have many aspects of the game that make it as flexible and broadly appealing as it is. D&D is the most successful TTRPG ever. The fact that we have evil is part of the secret sauce, removing it is easy for an individual campaign, removing it from the game altogether is what's being discussed.
Your game doesn't need evil. It's easy to ignore. To continue to appeal to the broad majority of people, D&D as a game needs evil. It's an easy and simple concept to grasp that just works for a lot of people.