Why "never bananas"? They are pretty much the perfect fruit. They have been eaten by people for hundreds of years. Monkeys in the jungle sure love them.
People haven eaten bananas for hundreds of years, this is correct. But again, the problem is, that the banana today is not quite the fruit they consumed centuries ago. The banana today is intoxicated by massive use of pesticides and (from what I know) genetically altered in order to resist fruit plagues like the one at the moment, which endangers the banana crop once again. A plague like this has already once almost extinct one sort of bananas. To quote wikipedia.
While in no danger of outright extinction, the most common edible banana cultivar 'Cavendish' (extremely popular in Europe and the Americas) could become unviable for large-scale cultivation in the next 10-20 years. Its predecessor 'Gros Michel', discovered in the 1820s, has already suffered this fate. Like almost all bananas, it lacks genetic diversity, which makes it vulnerable to diseases, which threaten both commercial cultivation and the small-scale subsistence farming.
Also, the banana is a fruit, unable to multiply itself, as it contains no viable seeds. I consider fruits lacking viable seeds as an unnatural occurence. The bananas being eaten centuries ago sure contain viable seeds. But they were most likely not suited for the world market.