On a slightly different issue, I can say that I'm a victim of buying into the message "animal fat is bad for human consumption" "eat margarine instead of butter" " butter is from animal fat and that is bad for you." We still see marketing slogans like "I can't believe is not butter" or simply name them with other names instead but they are margarines. I remember when margarines tasted so bad but we made the decision to switch because animal fat was bad for us. All these year believing that was a fact. When my diabetes got so bad last year and I began to research an alternative treatment to all the pills the doctor had me taking I learned to my total surprise that animal fat was actually not bad for humans, in fact, fats from sunflower for example, high in transfats, are responsible for many health problems including inflammation, fatty liver, etc and diabetics were actually encouraged to eat butter, specially butter from grass fed animals.
The only non animal fats that I still eat are olive and coconut oil, and avocado.
On the shaving soap front, I'm quite happy to use either base, PAA do vegan soaps and I rate them highly but I will not stop using soaps that have tallow because some people have an agenda against animal products.