Dessert encompasses so many different types of sweets. Of the more sugary decadent side, desserts can be pies, cakes, cookies, candies, ice creams, and a range of sugar-loaded confections. These desserts tend to not only be filled with sugar, but they are also loaded with carbs as well, which is converted to sugars (which eventually is stored as fat) if not used as energy in the body. While eaten in moderation, they are okay. However, if eaten every day, they can take a toll on the body’s ability to digest food properly, and in some cases, lead people to develop other conditions (being overweight).
On the healthier side, fruit is a great substitution for sweet snacks. Produce eaten naturally is probably the best option. While dried fruit and fruit preserves are natural sugars, sometimes manufacturers will add sugar to both to keep the products fresh, so they might not always be the best option. Finally, modern cooking technology has found ways to make even the most sinful desserts healthy. For example, vegans often make brownies from black beans to avoid using flour to make this particular confection. Applesauce is a great substitute for eggs in making cakes and fruit breads.
To answer the question, because of the various dessert types (including fruit) and the variations on making these desserts (substitutions), a person can very well indulge in desserts that incorporates both natural fruits and the decadent stuff, not eating too much of the latter.