From my experience, a successful UI doesn't need to map 1-1 to your domain/database models. The principle is "less is more", that means, deliver only enough fun

From my experience, a successful UI doesn't need to map 1-1 to your domain/database models. The principle is "less is more", that means, deliver only enough functionalities for users to complete their process. So, "less is more" just means "less distraction, more focus".