Comment by Terr_

To offer a possible example: What would the game Zork™ look like with an LLM? Assume we do not want to let players sweet-talk the system into letting them teleport to the end.

The LLM's job would be to channel "I perambulate in the direction of the Arctic circle" into go(north). You saved writing the grammar parser, but you still need to write the game world.