you can overeat fruit and vegetables and not all fruit is the same. Bananas vs kale is a good example. You should eat more kale, but you should avoid bananas unless they’re green (lots of resistant starch)
I suspect that the vast majority of the population is not overeating fruit and vegetables. Even if someone is eating ripe bananas, that's likely to be much better for them than eating another portion of fries/chips etc.