You seem to have not read the linked research

Actually, I was the first person to post the glucose-willpower hypothesis to lesswong, nine months ago.

consumption of sugary drink restores willpower in laboratory setting, and not one word you said makes any sense in light of this.

On the contrary - it does not in the slightest invalidate what I said. Glucose can be a bottleneck in some situations, and not in others. In those situations where it is, it will appear to be a magic bullet, and in all other cases it will fall flat.

That's not speculation, it's simple logic on the available evidence regarding the causal chain involved in willpower.

On the other hand, the reasoning you're using regarding glucose is plain old fashioned magical thinking.