For me a game is mainly a story medium with a big focus on interactivity and world building. Playing a game you become part of that world. A character in the story.

Narrative driven games use the challenge to simulate the characters struggle so advancing the story feels rewarding. Soul games needing you to reply the same boss for several hours to beat it doesn't make narrative driven games less of a challenge because they don't cater to the same public: one is casual and the other extreme and they don't spend nearly as much the same amount of time playing games.

Narrative driven games want to mainly tell a story and it's ending is the main reward, soul games want you to suffer through each battle and beating them is the main reward.