When they refer the mainstream information, they are referring to non peer reviewed literature. Based on your last paragraph, it seems that you would also prefer to use peer reviewed studies to make conclusions.

I’m not going to entertain the idea that a person’s country of origin precludes them from doing meaningful research on a topic. Instead, we should critique the methods and the sources that they used.

You also brought up soybean oil as a concern. I looked that one up too: www.sciencedirect.com/…/S0899900721002057

This article shows that replacing saturated fats in a person’s diet with soybean oil leads to the same results as if they had used another unsaturated fat. This is the expected result from such a dietary change. Do you have more information about the health concerns of soybean oil that you could share?