Toxicity of certain compounds in meat or other foods has nothing to do with the food itself being healthy or unhealthy.
Similarly how antioxidant, vitamin or macronutrient content has nothing to do with that particular food being healthy or unhealthy.
Promoting the idea that a particular food or ingredient is healthy or unhealthy is promoting orthorexic behavior, an obsession over what to include or not include in your diet because of a made up measure of (un)healthiness.
There are similar studies on casein/whey.
These studies do not make meat, milk, cheese or seed oils inherently unhealthy or show that you can't have them as a part of a healthy diet.
edit: doing a quick Google Scholar search I can find a bunch of studies that show positive outcomes after regular consumption of flaxseed (rich in omega 3s) or pumpkin seed (rich in omega 6) oils. These studies do not make these oils healthier.
There's a bunch of papers on Neu5Gc, should I start being scared of meat toxicity?
Diet containing seed oils can be healthy. Nowhere have I made an argument that an unhealthy diet will be countered by physical activity.