Frankly, I am more scared of the chemicals they put in food than I am of legitimate fats and dairy.
MrR has severe food allergies so we make pretty much everything from scratch - bread, mayonnaise, salad dressings, cakes (no mixes AT ALL), even our own pickles. I don’t fear food, but I do recognize that people can go overboard and not watch what they eat.
We are also lucky that where we live we can have our own garden and get farm fresh eggs for free.
And there isn't any comparison between homemade mayo made with yard eggs and the store-bought canola/chemical emulsion.
/johnny