Bananas are a mono-crop. There was a disease in the latter half of the 20th century that threatened all bananas on the planet. A particular strain survived. This strain is what you NOW think of as a banana. The candy tastes the way bananas used to taste.

counterpoint: youtu.be/I9ZtvpBoXzI

TL;DW banana candy does not taste like cavendish either

I Ate the Extinct Banana (so you don't have to)

YouTube
He did find that the artificial banana flavor tastes the way gros michel bananas smell when they’re very ripe, though. So I don’t think it’s wrong to say the flavor is based on the gros michel rather than the cavendish, it’s just that flavor is a really complex equation and artificial flavors tend to fail to capture the totality of the experience.
Yeah it’s only with grapes that they really captured the best part
The Japanese have nailed green apple