Yet the Torah unambiguously permits consuming flesh.
"Every moving thing that lives shall be food for you; as with the green herbs have I given you all these"The Torah simply equates flesh and herbs. There isn't any hierarchy of preference.
Hirsch, Bereishit 9:3, New Edition P. 222.
R. Hirsch elaborates as to what changed to make this so. Certainly "Eskimos" [Inuit], would find it difficult to become vegetarians. Any cold climate could present a similar challenge