Quote Originally Posted by heynowjose View Post
This content is just that. A challenge. The reward is beating it. That's it. It's not meant to help casual players progress further, or be played for years on end, or help keep you busy until the next patch. It's only meant to give a challenge to players who've mastered all other content.
And there's nothing wrong with that.
The reason games like Dark Souls, Devil May Cry and Cuphead (for a more recent example) are popular is because people like the challenge those games provide.

It doesn't need to be useful, you might only play the game for gearing up and progressing but there are others who actually just like playing for fun, and if it takes fights like Unending Coil for that then who are you to take that away from them?