Interesting article.

It would have been more actionable if you had listed some foods high in each kind of fiber.

I've read that there's a need for both soluble and insoluble fiber, as the two work together slow absorption in the small intestine (lowering a potential glycogen spike - and blocking absorption of at least some fructose there, where it goes straight to the liver via the portal vein). Blocked carbohydrates eventually becoming fatty acids.

Nephrologist Dr Richard Johnson has been doing some interesting work around fructose being a trigger for fat accumulation, normal in all animals, useful for intermittent food availability (e.g. hibernation, long distance migration), but we humans have a mutation that makes us more susceptible than other mammals, probably due to an environmental change that made food less available through the year.

Also, to those responders banging on about fiber not being an "essential nutrient" - go look at the definition of essential nutrient (classical ones below)

Nutrient: Substance in food that provides structural or functional components or energy to the body.

Essential nutrient: Substance that must be obtained from the diet because the body cannot make it in sufficient quantity to meet its needs.