I get almost all my information from the LDS and the University of Utah. There is hardly anyone I know that has done as much research and study of the shelf life of foods as the LDS has.
Yes there are foods that are bad for you, but man wiping a skillet with a bit of Crisco to fried some scrambled eggs and potatoes isn’t going to make you fall over dead, but whiping it with rancid oil will.
But telling people to store stuff with limited shelf life will kill people very quickly.
It is you that are missing the points.
Crisco and margarine are not “foods.” They are manufactured products that are definitely harmful in any quantity, and especially so if normal food oils are not present in the diet.
There is no legitimate reason to use them. Lard works better, and keeps well, and is a real, useful food that will counter the effects of non-foods like crisco, because the body will use the real oils over the fake ones if it can.
Learning what to store and how to store it is one of the most beneficial things that one can do.
BTW, LDS say that coffee is harmful, but no evidence of that has ever been discovered, even after 100 years or more of study. Yes, excessive use of coffee can do harm, but that can be said for most things.