>>The Fat Free Message is a Public Heath Disaster

Blame Ancel Keys, a "nutritionist" (actually qualified as an ichthyologist, which has nothing to do with human nutrition) reacting to the correlation of total serum lipids and CHD events, and starting/pushing a "low fat" solution. https://www.dietdoctor.com/the-hidden-truth-behind-ancel-keys-famous-fat-graph

Here's the thing: outside of medium chain triglycerides, ingested fats have very little effect on serum lipids.

But dietary fat is where the flavor is - processed food manufacturers latched onto "low fat" as a way to sell product, replacing fats with carbs/sugars - and increased carbs do increase serum lipids.