Why are you afraid of sugar in a food matrix?
Discussion
He isn’t. But as in most things in life it is about moderation. He is simply pointing out that you may over consume without realising it.
Zero things in life are about moderation. If you have to rely on a concept of "moderation" in order to justify a course of action, then you don't understand what makes that course of action actually good.
Replace moderation with effective dose
Everything has trade offs. Some people are more resilient than others, and people value things differently.
If you can perform a one-to-one replacement then the effective difference between the terms is very little as I'm sure you understand. In other words, person still has to be able to explain WHY a particular dose is more or less effective than any other dose.
Then you can go ahead with your unrestrained pursuit of the dose that produces the most extreme effect of the kind you are looking for.