Diseases are defined by pharmaceutical companies, so that the explanation leads people to conclude that the solution is one of their drugs. Pharmaceutical companies are heavily involved with medical schools and doctors in order to push their drugs on people. Cholesterol lowering drugs are useless. I just heard about a study where people with higher cholesterol had less heart problems.
The video that came from also mentioned a group that manipulates the government here in favor of vegetable oils. Americans used to eat tons of butter and lard, and they didn't have heart problems like they do now. The first heart attack recorded in America is from 1921, after vegetable oils (margarine and shortening) got popular. They just increased after that.