If it wasn't enough that animal fats taste much better, it's also the healthier option.
I've heard that animal fats are better than that now-banned partially hydrogenated crap, and a lot of people lost a lot of trust in modern nutrition science because of it, which I suspect is a lot of how the idea that animal fats are healthy got popular, but that doesn't prove they are better than regular vegetable oils.
I doubt that this is true for the source of the fat