Nothing is particular about the US here, humans are omnivores whose optimal diet for health contains both meat and plants.
https://en.wikipedia.org/wiki/List_of_countries_by_meat_cons...
In 2017(latest data I could find), the US was topping the world's charts on meat consumption per capita.
There is something at least noteworthy about that. The average american eats 40% more meat than the average EU citizen.
Not everything can be so easily brushed away under the guise of human nature.
Vegetarians can be, and usually are, just as healthy as meat eaters. And no optimal diet contains meat in the quantity Americans eat on average. Japan has barely 1/3rd the per-capita meat consumption with better life expectancy and health.