No one is stopping you gorging yourself on sugar if you want, but to have so much intrinsically put into our food is ridiculous, especially since its just used as a cheap bulking agent for profit and has no useful nutritional aspect to it at all.
This my friend is modern brain washing. Sugar is one of the most nutritious foods. That's WHY it is causing so much fuss.
What the current pop culture trend is trying to steer you clear of is nutritious foods because people are eating too much. If you can't stop them eating too much - and surely the for-profit food industry would go postal if the government tried to tell them to sell less food - then you have to convince people to eat less nutritious foods.
The only possibly complying argument for the "sugar is not nutritious" mantra is that with sugar sugar high diet you could potentially hit your daily calories allowance without eating enough vitamins etc. Though this is also fairly unlikely unless you literally eat sugar, cake and drinkcoke.
In order of weight:
Carbohydrates
Fats
Protien
Vitiamins
The later is "trace" and measured in micro-grams or milligrams. The former 3 are in abundance in nearly all basic diets.
It's quite simple. ALL life on this planet runs on the same basic machinery. The mitochondria. It's like the PSU in your PC. It turns carbohydrates into energy. That is the equation of life, the equation of metabolism. It has a sugar on one side and energy on the other. All life, generally speaking is made of the same stuff and eats the same stuff (with some bacteria as exception). All life either eats other life or is eaten by other life, so as long as you are eating other life forms and ... they needed mostly the same nutrients as you and thus contain the same nutrients as you need, you will be fine.
The rest is about "essential indexing" where you look at the absolute maximum demand for a certain nutrient in a day and prescribe that your daily diet should meet or exceed that level... just in case. This is really not necessary. Sure it might have some marginal benefits to max'ing all these out but they are significantly diminished returns the further you get from a "normal" diet.
The current propoganda is just part of the same campaign as the sugar tax. What is worse is the world is stock full of charlatan diet advisers and just plain ignorant or dead wrong diet advisers. The main reason the government do not regulate said dietary advisers is simply because it's very difficult, obesity aside, to do yourself much harm by eating badly.
If you look at studies on nutrient deficiencies in the UK with our supposedly terrible diet you will find the most common is vitamin D which is produced by sunlight. There are some lower than would be liked vitamin levels due to eating less greens, but it is in no way a problem. You could technically eat a high sugar diet, as long as it was varied and be 100% healthy... you would just have to eat less of it.
EDIT: One final thing. The difference between protien and vitamins compared to sugars and fats is that the excess of the former typically passes through into the toilet. The later, sugar and fats are stored because they are the most essential to your life. Thus we have obesity.