Fully voice acted line somewhere in the game following this logic.
1) Boring combat.
2) Four useless conversation lines -- a fifth one that drives the story forward.
3)A useless conversation line that appears to allow someone to do something incredible. (Channel the power of your brain worm to summon Asmodeus.)
4) Receive the output, "That would break the linear story line!"
Just so it's there somewhere in the game. No one's watching, developers.