There is no science behind the recommendation for the population to consume 55% of their diet as carbohydrates. This unscientific number was the result of the recommended intake of fat as a percentage of the food being reduced. So carbohydrates were utilised to fill the gap. That is all there is to it.
It is probably no accident that we like carbohydrates. It might be an evolutionary adaption. People have talked before about the addictive properties of carbohydrates. There are glucose sensors in the hepatic portal veins that are linked to the addiction centres in the brain with functional MRI.
In the early years of human evolution, carbohydrates were probably necessary for survival. In the summer and autumn months, fruits and other sources of sugar become available. These things are scarce at different times of the year in northern climates, such as in the UK.
So, eating to excess and then converting the carbohydrates into fat would be crucial to help the human-animal to get through winter. Humans would fatten up in time for the winter. We see this behaviour all the time in other animals, such as migrating birds but also in hibernating animals such as bears. Humans are after all still animals.
Forced intermittent fasting through the winter months would likely be the norm, and fat stores would be essential to provide energy on those days when there was scarce food.
Someone once said that we are eating carbohydrates throughout the whole year for the winter that never seems to come. Society has become used to carbohydrates for every meal, and the pleasure they bring is probably not accidental based around the things we have talked about earlier.
However, that does not mean that people who do not eat carbohydrates cannot enjoy their meals. A low carbohydrate diet provides many delicious foods that can be found on this site many other sources online.
We will be looking at the issue of carbohydrate addiction in a webinar, which you might want to check. In this webinar, two specialists talk about addiction, how to recognise it, and how to help yourself manage addictive feelings.
This link might be of interest.