Not really. My ancestors were among the first farmers on earth (10k years ago). Been almost fully vegetarian for millennia because of the nice climate. We have likely adapted to that (at least our gut bacteria must have, since gut bacteria have much shorter lives and one human life is thousands of bacterial generations). It doesn't make us sick or weak, just as eating grass doesn't make a bull sick or weak.

Europeans have a very different dietary history and may not have the same degree of adaptation to a vegetarian diet. So I can understand if they react badly to vegetarian meals (not talking about vegan, since you need at least dairy to meet some nutritional needs).

Another reason why one civilization shouldn't copy blindly what works for another civilization and medical treatments tested on one civilization may not transfer as expected to another.

Not really. My ancestors were among the first farmers on earth (10k years ago). Been vegetarian for millennia. We have likely adapted to that (at least our gut bacteria must have, since gut bacteria have much shorter lives and one human life is thousands of bacterial generations).

It doesn't make us sick. Europeans were late to farming and may not have the same degree of adaptation. So I can understand if they react badly to vegetarian meals (not talking about vegan, since you need at least dairy to meet some nutritional needs). For Europeans, meat eating is the traditional diet.

Another reason why one civilization shouldn't copy blindly what works for another civilization and medical treatments tested on one civilization may not transfer as expected to another.