Food is more properly understood in totality than merely as isolated nutrients. However, it is easier to design scientific studies that focus on isolated nutrients.

Whole fruit contains vitamins, minerals, fiber, and significant amounts of water. Whole fruit contains intact plant cell walls. It's very important to eat intact plant cell walls, but that's difficult to determine from studies of isolated nutrients. Because of the bulkiness caused by water and fiber in whole fruit, it's difficult to eat large amounts. For example, it takes about four oranges to make a glass of orange juice. Most people would not eat four oranges, but most people could easily drink 1 or more glasses of juice.

The wild fruit eaten by primates has less sugar and more fiber compared to fruit cultivated by humans. Human cultivated foods, including plants and livestock, are much richer compared to wild plants and animals, having more fat, sugar, starch, and calories in general, than what could evolve in the absence of pest control.

Humans have evolved quite differently than other primates. We have a rare ability to digest large amounts of starch, a capability shared almost exclusively with rats and pigs. It's difficult to compare our diets.

Primates consume significant amounts of foliage (leaves and such). You probably should too, green leaves are very excellent for your health.