Yep. Fruit is 3 kinds of sugar:
Fructose
Glucose
Sucrose
But no, fruit is not very nutrient-dense at all, it's only good for energy. And the only people who can have fruit without it affecting them are those who are metabolically healthy. Currently in the US, that's roughly between 11-12% of the population (a generous guess, that figure I just quoted is from about 8 years ago).
People who have weight to lose don't need to consume any more calories from energy, which can potentially become stored energy rapidly if they don't burn it off (goes directly into fat stores including organ fat stores like the liver, intestines, kidneys, and pancreas, as well as in the peritoneum and omentum).
Those of us who have weight to lose (I am among them, still working on it) have PLENTY of stored energy on our bodies in the form of excess adipose body fat, and even lots of visceral body fat (the type clogging up the areas surrounding our organs, as explained above), and people like that (including me) don't need fruit or any other sugars in the form of starches or grains, period, if they want to get rid of that excess fat.