You don’t have to take my word for it; you can take one of UCSF professor Lustig.
https://robertlustig.com/metabolical/
Edit: yes of course, glucose is the energy of life but you don’t need to consume it. I think all(?) carbohydrates break down into glucose; ergo you can get it from broccoli. Simple test is blood glucose finger prick test after eating.
But I did mean that there are people that argue that you need added sugar for proper nutrition. These people exist.