I sometimes see articles advocating low-fat alternatives such as low-fat milk, yoghurt. My whole food plant based approach which emphasises a low-oils approach would not recommend foods that have such "reduced" fats in them. These reduced fat products are still processed, and as with many on this forum of all complexions processed foods are not recommended in whatever form.
The low oils component of a plant based dietary approach is about reducing intake of all refined oils including spreads, sunflower, olive oil, and even the extra-virgin varieties. It even excludes things like high-end oils such as coconut, walnut, flax seed oil. And yes it excludes fish oils. Whatever oil it is, it is out.
The reason for this is in two parts. Firstly the refining process removes almost all of any nutritional value, leaving the highest calorific foodstuff on the planet. The second is the consistent research showing how oils are inflammatory to the human body.
For anyone interested in removing oils from their diet, I recommend to migrate slowly. There are new cooking methods to learn. And unless you have specific health challenges then slow adoption is best.