Oil, healthy or unhealthy?

If you look in Pubmed, you will find several articles, which show that substituting saturated fats(e.g. butter, lard) with mono and polyunsaturated fats in one’s diet results in reduced risk for cardiovascular disease. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5577766/   Looking at the largest diet and health study co-sponsored by the NIH(National Institute of Health) which compared fat from plant