Fats are one of the most misunderstood macros of the three (I would give the most misunderstood to the carbohydrate, when it concerns the mass public).
We can thank, in part, the low-fat culture of the past for this way of thinking.
When you begin to look into how various hormones are made/induced/released, etc ,(with what is currently known), one will obtain a clear picture, that dietary fat (including some saturated fat and cholesterol) are needed in the biological process.
Though these aforementioned items are needed, there is a risk with too much, as with most things.
After losing 40+ unwanted lbs: