I don't think one is better than the other. They are both critical and serve a different purpose.
"What needs to be obvious?" is a design question. It's important, but it doesn't tell you what you should be doing each day.
"What's high priority?" is a project management question. Once your product already exists, and you have a zillion features that should be possible but don't need to be easy, you then have to prioritize all of them to figure out what gets done.