This is a post, despite the title, because it is a rhetorical question.
Let's start with fatty liver disease. The French have mastered the production of this in ducks and geese, as foie gras. Do they feed them saturated fat? No.
Now consider how fat deposition is encouraged in cattle. I watched the series 'Mud, Sweat, and Tractors' that concluded today, focussing on beef. They use barley to speed up size acquisition, in the form of fat, and graze cattle on grass to marble the beef. Feeding adult bulls on saturated fat from other cattle lost credibility with the BSE crisis; lean cuts were in vogue then, and the taste suffered as a consequence the programme related.
Japanese wagyu beef is extremely expensive, the demand being driven by its exceptional marbling. They are purely grass fed; no saturated fat in their feed at all.