I agree...it shouldn't be a big leap in logic ...but I always hesitate to say it definitely is true because of things like Guinea pigs needing vitamin C in their diet but bunnies not (they make their own).
I wrestle with the balance too...there are so many players in the game, between interactions between vitamins and minerals and what we can get in the way of insects to feed to the chameleons and what we need to feed the insects. I've always tried to take a middle road approach...supplement some...feed a variety of foods to the insects...try to provide a husbandry that can sustain the chameleon in a healthy condition but isn't necessarily "natural"....if something works, leave it alone...if it doesn't try something else.
You said..."I definitely don’t know the formula, but this article emphasizes how far I have to go to understand and properly implement my Chams nutrition".... This has driven me crazy for years. There is so much that plays into the diet of all creatures!