Here’s how I view such things:
Totally healthy stuff often tastes either somewhat like cardboard/sawdust on its own, or rapidly gets boring. The flavoring bit that goes on top helps keep you interested in eating it. So a moderate amount of jelly/jam/Nutella/whatever on top of your whole grain bread/toast/waffle/cracker/whatever helps make the rest of it more palatable.
It’s all about net gains.
Will you eat more green beans if they have butter or some other dressing on them vs. steamed plain? Do the health benefits of more green beans outweigh any downside to the topping?
Likewise, if spreading Nutella on whole-grain extra-fiber toast means your kids eats the whole-grain extra-fiber toast instead of a Krispy Kreme donut then on the whole Nutella embellished toast is probably the lesser evil. To bring up another example raised in this thread, back when I worked in the Chicago Loop I actually switched from banana-nut muffins to Pop-Tarts at one point. Why? Because I read the labels and the Pop-Tarts were actually healthier than the muffins. Fewer calories, sodium, and fats per serving. That didn’t mean Pop-Tarts were good, just that they were better than what I had been eating. The move was a net gain for me.
The key word is moderation. Something our modern consumerist society does not encourage. Not only do we not eat the healthy stuff as the default, but when we do reach for a box of presumably healthy stuff most of the time it is drowned in topping/sauce. Not to mention all the other crap in there to compensate for the fact that preserved food is never as good as fresh (well, things like pickles excepted).
Of course, the food industry is not your friend. They’re interested in profits, not nutrition. The New York Times recently ran an article on The Extraordinary Science of Addictive Junk Food. It’s all about getting you to eat more. If high fiber and low calories would do it that’s what they’d do, but fact is we’re biologically programmed to lust after sugar, salt and fat.
(Speaking of deceptive advertising - the New York Times offers full access to their site for just 99 cents! For the first three months… then the price goes up… but 99 cents is large and prominent and the bump in price is small text and tucked in the corner, so to speak. Same practice, different product)
So yeah, Nutella can taste good - all that fat, sugar, chocolate and nuts (both foods that are associated with yummy fats)… It’s designed to taste good, although to those of us still used to less processed foods it’s about as subtle as a fist to the nose. Like sugar or honey in the oatmeal it makes the bland stuff taste better. Like sugar in tea or coffee it can mask bitter notes. (For that matter, like sugar in chocolate, which is also bitter in its unsweetened state but I’m not say chocolate is a health food.)
If we were all eating as we should the extra sugars and fats in something like Nutella would not matter. The problem is that we’re encouraged to eat too much of sugars and fat and not enough of the rest. That’s not a problem solved merely by legislating more label rules.