I don't doubt that one can find health benefits in beef tallow. But I also vividly remember ads in the 80s and 90s that promoted the health benefits of seed oils and margarines, which years later proved to be cherry-picked facts. So, I'm skeptical on whether we have the same thing happening, only now it is beef tallow that is promoted by cherry-picking studies.
And frankly, RFKs "new pyramid" is at least misguided, if not worse. Bread and grains at the bottom of the pyramid make no sense. In mediterranean countries (e.g. Italy, Greece, Spain) bread and pasta are on the table in ample quantities every single day. And guess who has longer life expectancy than the US.