The reason the hatcheries suggest not feeding fruit is because of yeast infections. The sugars get trapped in the nasal cavity where the fungus can grow, And yeast feeds on the sugars, Out of the several many and different birds I own, I only have 1 pair of siamese fireback pheasants that are prone to yeast infections of the mouth and nose.
Other than that, feeding fresh fruit is highly beneficial
Other than that, feeding fresh fruit is highly beneficial