Twenty years or so ago, it was the low-fat craze — they demonized fat. Then we discovered the body needs fat, and was especially low in Omega 3 fats, so the mantra was eat the right fats. But now the pendulum has swung all the way over to the over consumption of fat — the Keto diet recommends that 70% of what you eat should be fat. The Keto people are even now apologists for how “healthy” saturated fat is. Crazy.
But don’t let it upset you. Just wait another 20 years and fats will be all bad again.