A demand for the average American to eat more meat would have to explain, as a baseline, why our already positive trend in meat consumption isn't yielding positive outcomes. There are potential explanations (you could argue increased processing offsets the purported benefits, for example), but those are left unstated by the website.
[1]: https://www.agweb.com/opinion/drivers-u-s-capita-meat-consum...
[2]: https://ers.usda.gov/data-products/chart-gallery/chart-detai...
EDIT down-thread to prove my point you'll see people citing studies in favor of and against the new recommendations. The studies are almost always in animals or use self reported data with tiny sample sizes.
Obviously there are exceptions - particularly right now - but those are solved by rooting out corruption.
In any event, looking at the whole history of food guidance paints a clearer picture of my point. Happy to hear of alternatives though!
> attempt to improve heart disease rates
The diet basedheart disease science of the early 1990s was totally junk.[2]
[1] https://pubmed.ncbi.nlm.nih.gov/8375951/
[2] https://www.ucsf.edu/news/2016/09/404081/sugar-papers-reveal...