The article quoted in the link (https://www.frontiersin.org/articles/10.3389/fnut.2020.00053/full https://www.frontiersin.org/articles/10.3389/fnut.2020.00053..

The article quoted in the link (https://www.frontiersin.org/articles/10.3389/fnut.2020.00053/full https://www.frontiersin.org/articles/10.3389/fnut.2020.00053...) contains a list of plausible hypotheses and mechanisms for why some amount of fat might actually be good for you. I don't have enough background in human physiology to say how seriously those should be taken, but there you go.