Haha table sugar has zero nutritional value if you’re going to make that argument. But that’s a neat Google article you found there.
Sawdust cannot be easily turned into energy by the human body.
I regard food sawdust, called plant pulp and cellulose in the food industry, as a type of low cost food additive that actually interfere's with nature's nutritional bounty, of which sugar is one.
https://www.prevention.com/food-nutrition/healthy-eating/a20457107/31-foods-that-contain-sawdust/