I watched an interesting video the other day that purports to answer that question.
The way this dude describes his medical issues.. could have been me, tho mine are slightly different.
https://m.youtube.com/watch?v=icICyFKKZPg&pp=ygUVSGVhbHRoIHByb2JsZW0gYXV0aXNt
(Tl;dw - it’s stress and anxiety from always being on, masking, and failing to fit properly)
I don’t use it sparingly and I also have a jar of bacon grease.
The day I learned to put a coffee filter or paper towel in the jar under the lid ring to filter the hot oil? Game changer.
My grocery store carries “bulk bacon” which is packs of low quality fatty bacon that’s great for cooking. I buy that sometimes and the grease off a pound fills a pint jar about halfway, sometimes more.