The trouble with NHANES is its observational epidemiology, we can find both positive and negative correlations with red meat i..e [Paper] Grilling the data: application of specification curve analysis to red meat and all-cause mortality

If we control people for the Standard American Diet (no sugar, no processed oils, no processed food) - they will do well regardless of the specific intervention. I have epidemiology that shows people do meat on higher red meat consumption... but it has the same problems.

I have strong opinions on Standards for Nutritional Evidence

There are populations where consumption of red meat isn't necessarily correlated with a unhealthy diet like hong kong, and the Mediterranean (yes, many people in the Mediterranean actually eat red meat).