The description you quote is of the tutorial of the game, not how the overall game mechanics work.
I don't really want to get into another debate over whether casual games adopting adventure elements is good or bad for the "true" adventures, but for another example of how adventure games perhaps aren't quite as intuitive as their fans think, check out
this wonderful article where LucasArts/Telltale designer Steve Grossman has his mother-in-law try a recent Sam & Max game.