Why do you think the public was more accepting of trans fat than of animal fats?

Trans fat is cheap and can withstand multiple heating without breaking down.

Explanation:

Trans fat is made by adding hydrogen to unsaturated fats, that is hydrogen is introduced to vegetable oils. Big oil companies also spread that it is easily digestible, can be used. multiple times, etc Trans fat was cheap compared to animal fats in the market. Using trans fat instead of butter made a lot of sense to them.