Should oil be avoided?

Hello Dr. Katz, What are your thoughts about the fear being instilled in people by plant based doctors such as Esselstyn(especially) and oils effect on FMD, endothelial function as well as contributing to the progression of atherosclerosis? This seems like a sensationalist argument but at the same time can be convincing. How should we as consumers look at these suggestions given that the certain oils have been shown to be heart healthy? Thanks