Any hunter-gatherer would prefer to eat lots and lots of animal fat. I don't think you have to render it, just eat it along with some protein. 30% protein indicates a high animal consumption, as the hunter-gatherer will eat more of the fat than the muscle if he can help it. Bones were plundered for bone marrow, insidey parts were eaten and muscle discarded except in times of extreme famine. Honestly I would rather eat plants than extra protein, any more than 30% protein would be unbearable.
I will refer you to Loren Cordain's work at thepaleodiet.com
There's hunter-gatherers. Mostly animals.
And exactly what are you worried about? Is the CW machine so efficient that people are afraid of eating meat for no good reason at all? If something is bad, it's bad for a reason. What's the reason?
I say eat whatever makes you feel good, but not the artificial kind of good like a candy bar or opioid-like peptide rich bread. For me good is a steak with some steamed vegetables drenched in animal fat.
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!