What's Ernest getting at?  It's about world building, sentence structure, word choice.  These are the bricks of your story.

The colour of your walls, the light fixtures, the kitchen appliances are of no use if the walls aren't crafted to hold up the roof. So the best plot won't stand if the bricks (words) and walls (sentences) don't stand out.

Be the architect of your story.  Choose your bricks carefully, wisely and specifically.

Are you an architect or interior designer?