The identification of Musa paradisiaca with a plantain and Musa sapientum with a sweet banana probably reinforced the tendency to associate each name with a type of fruit, respectively plantain for the cooking types and banana for the sweet types. In fact this distinction is entirely semantic and artificial. It has no botanical basis, nor indeed any consistent culinary basis. A banana is a banana, whether it is cooked or eaten raw.
But you knew that, right? The quotation is taken from the Musapedia on the all-new, all-singing, all-dancing ProMusa website. So for more than you could possibly want to know about banana nomenclature, and much else besides, you now know where to go.
Now, just remind me, what is the difference between a banana and a plantain?