This hypothesis is still part of some anti-meat propaganda. They start from the idea that red meat is bad, and then they retroactively try to adjust their "science" with creative solutions.
Research done in Italy about the Sardinians showed that the people who got to live longer where specifically the shepherds. They had a very peculiar life style which brought them to get much more exercise and to eat more animal sourced foods.
The remaining townfolks had a more "average" lifespan even though they shared the same genes.
You joke, but it has been going on for a while: The Global Influence of the Seventh-Day Adventist Church on Diet (https://www.mdpi.com/2077-1444/9/9/251/htm). And obviously as mentioned by another the processed food industry etc.
I'm half joking, but the lobbying power and subsidies meat and dairy industries command is a complete other ballgame than vegetable farmers and plant-based food companies.
Funny the agenda-laden downvotes I'm receiving as well, despite ample evidence. Only an artifact of folks perceiving a conspiratorial political bias before considering the damage the WEF is in fact doing to the world by installing unelected "young leaders" into any nation or corporation it can get its dirty hands on, determining policy and international direction without the consent of the governed, much less, not nearly enough consent if any exists at all, outside of the political elite who already endorse them for their obvious financial gain.
