The author's conclusion was that it's important to eat either STARCH and glucose to let the blood glucose rate not to vary too roughly (insulin).
On the contrary, in an old post, RRM wrote:
"For fructose to be converted into glucose it takes a quite complex pathway. Starches indeed are long chains of glucose, that only need to be cut into pieces.".
It seems the opposite, indeed...

Could you explain clearly, pls?
Thanks.