Eh, not the same map.
Japan seems to be lower than China. Mexico and Brazil and Argentina are at or above levels of most of Western Europe. China, Russia, Kazakhstan, Chile, Vietnam, Myanmar are at or nearly at levels of western Europe.
Really only the US, Australia, Spain, Mongolia, Argentina stand out here.
I'd say more than anything this portrays maybe herding culture historical development as well as relative access in the modern era to grazing lands for animals, feed-stock, etc though probably not a perfect representative of that. Americans are really the stand-out along with Australians who have lots of range and space (stolen) for breeding and raising massive herds to allow massive, cheap consumption. Argentina also has this benefit (and even in the US you'll see a lot of Argentinian beef).