Yes, all the writing teachers say it the other way around. But there is a place for narrative.
They always tell us in the beginning to write in scenes and "show don't tell" and narration is "telling." But you can't show everything in the space allowed. So my advice is to narrate the mundane, the background information, and the action in scenes that don't move the story forward. Basically your story scenes should be like shining jewels and the narration like the silver wire that strings them together. Most writing texts don't get into how to do narration and it was years before I figured it out.
It's pretty simple. Show the good parts. Tell the boring parts. :D