In brief, worldbuilding is different than setting in my opinion. Setting is a room. A backdrop. It's scenery. But without good worldbuilding, you can't have realistic feeling scenery. You can't have cool, unique backdrops for your story.
Patrick RothfussWith slow care rather than stealth we must approach the subject of a certain woman. Her wildness is of such degree, I fear approaching her too quickly even in a story. Should I move recklessly, I might startle even the idea of her into sudden flight.
Patrick RothfussWe try to spread the word about the charity by doing fun little stunts to catch people's attention. Like when Hank Green did a music video for us.
Patrick RothfussI think authors are just realizing there's no real reason to feel limited to a narrow set of genre rules in their writing. There's no reason a mystery novel can't have fantastic elements in it. Similarly, there's no reason why your epic fantasy series can't have elements of a mystery.
Patrick Rothfuss