If you eat a banana in Europe or the U.S., there’s a 99% chance it was harvested just as green as the one in the picture.
Today, bananas are harvested unripe in their countries of origin because they’re much easier to transport that way, and they’re then fumigated with ethylene in large ripening facilities at their destination to allow them to ripen further. This way, the logistics process is less stressful during transport, and the customer gets a perfectly ripe banana at the store... though I don’t understand why they used bananas for the photo that were taken out of the ripening house too early.