https://nutritionstudies.org/plant-oils-are-not-a-healthy-alternative-to-saturated-fat/
plant oils experimentally promote cancer much more than does saturated fats—that’s right. This is an experimental observation that is at least 30-40 years old.
From a practical perspective, however, this mainly refers to added oils-isolated from plant sources. It does not refer to the oil within those plant-based foods because plants contain lots of antioxidants to keep the tissue damaging effects of ROS [reactive oxygen species] under control. In my opinion, this is a primary reason for avoiding consumption of added oils. Another reason for avoiding these oils is their contribution to total calorie intake which displaces, in effect, the consumption of calorie containing whole, plant-based foods.
– T Colin Campbell