There is no nutritional value at all to sugar just like a drug.
It aids in cancer. https://www.pbs.org/newshour/science/sugar-industry-withheld-possible-evidence-of-cancer-link-50-years-ago-researchers-say
Everyone should be taking steps to reduce the amount of sugar consumed, especially in their kids. It is a hard habit to break, if you start off addicted as a kid.
I also find it hard to believe that replacing it with a sugar substitute is better but we may not know the impact of those for another 50 years.