So many cases in human history are where one thing is believed, people and studies come and show that it's false, and then it takes a really long time for culture to come around to it. Earth being round, tobacco, climate change among others.
Based on what the non-industry funded science shows, saturated fat being considered any bit healthy is in the long stage of culture taking a long time to accept what the science is saying. And it's not helped by studies with industry funding that know how to skirt the edges. Many places to choose from, but here's one from Dr. Barnard talking about sugar vs saturated fats [2].
[0] https://news.ycombinator.com/item?id=41957637 [1] https://www.youtube.com/watch?v=OkqWdY5_2-8 [2] https://www.youtube.com/watch?v=8xeHDqBB6X0