Raising blood sugar is not harmful for humans, independent of pre-existing diabetes.

“From the outset, it's important to point out that "naked sugar" (think table sugar= sucrose and high fructose corn syrup) has different effects in the body than sugar consumed as a part of fruits/fruit juice/honey etc.. we'll get to this eventually... Most believe that "naked sugar" is bad for you because if raises your blood glucose, but there is a dearth of evidence to actually suggest that raising your blood sugar is harmful for humans at all independent of pre-existing diabetes (PMID: 30249012).”