The circumstances may be different, but the point is that success is success, and it can be replicated.
"Casual" and "hardcore" are gaming moods. Games can be labeled with these terms if they are intended to be played casually or hardcore, but it doesn't mean the person playing them must fall into one of the two groups.
"Non-games" was a bad term coined by Nintendo, but it's been made even worse by being used as a label for games a person doesn't like, as the example above shows.