Brazil's a big country too and it's not like all the bananas are grown an hour outside the cities or anything. These sit around in supermarkets, they're not delicacies you have to find at a farmer's market that go bad in a day or something.
I really wonder if the issue really is just lack of awareness. I can't count the number of articles I've read that basically lead you to think Cavendish is the only banana being grown at large scale anymore, when that's just not true.