nature intended sugar to be used to prevent starvation during the long periods (sometimes weeks) ancient humans went without finding food. we evolved to enjoy it so much because humans needed to want to eat it whenever possible since in nature it doesn't occur that much. not eating any carbs means you'll go keto, which is a survival mechanism meant to increase the chances of finding actual nutrition. you were simply not meant to eat sweet things everyday and the insane amount of insulin that's considered normal for children will have lots of metabolic and cellular consequences starting in midlife if kept up into adulthood
https://pmc.ncbi.nlm.nih.gov/articles/PMC10305118/sucralose activates taste receptor type 1 member 3 (T1R3), generating reactive oxygen species (ROS), and triggering endoplasmic reticulum (ER) stress and lipogenesis,