Show me the chemistry. Show me how sugar in a raisin is somehow significantly fewer net calories of glucose than just eating the equivalent in refined cane sugar or wheat flour. Sure, it takes a small amount of energy to reduce other sugars to glucose, but I can't see how it can be enough to make a difference in a weight loss diet.
Eat white sugar you will quickly get an energy boost but whatever cannot be used will be stored.
Eat a complex carb and it requires more steps to breakdown. That allows for a slower release of energy and less of a need to store.
The digestive system is a pipeline of processes.
https://www.healthline.com/nutrition/sucrose-glucose-fructos...
I know, because i knew such strong person that was frickin healthy even in her 90 years - one of my grand grand grand mom. Rosy cheecks, wrinkled face of a worker. Still later in her years, was no problem for her waking up and working a lot.