It's not entirely wrong but it kind of started with an industry having a surplus of vegetable oils and looking for other markets that they could sell it on (it

It's not entirely wrong but it kind of started with an industry having a surplus of vegetable oils and looking for other markets that they could sell it on (it was used for soaps till then). So they started finding out how to make it food-ready and introduced additional processing so the oil wouldn't go rancid as fast and closer to fats that people were accustomed to (lard, butter). They were cheaper than the traditional fats, which opened a market. Then, traditional fats were pushed out due to health concerns. Nina teichholz has written about the history and offers a dissenting opinion to the recommendations of unsaturated oils if you are interested https://thebigfatsurprise.com/ https://thebigfatsurprise.com/ It seems the