Lots of fruits and vegetables have been bred to change their nutritional content (wild strawberries are 1/3 inch long, etc) So fruit really isn't 'natural', an

Lots of fruits and vegetables have been bred to change their nutritional content (wild strawberries are 1/3 inch long, etc) So fruit really isn't 'natural', and it being natural wouldn't mean it was good for you, anyway - fruit evolved as a tempation to animals to get them to help plants distribute seeds - that's it. Plants were selected based on how well their seeds were spread, so they came up with fruits which attracted animals. If they could have come up with versions which hurt the animals a bit, they wouldn't have even known or cared.