Should we eat vegetables indigenous to where we came from or where we live?

There are only 6 fruits and vegetables that are native to North America. The vegetarian staple, soy/tofu is not from there either. Neither are potatoes and a whole list of other vegetables. Even wheat is not from this continent. If vegetarians stick to what you said, none of you would survive the winter. There are many animals on the other hand that are native to this land and omnivores can have them plus whatever native fruits and vegetables there are. That's how man evolved into the omnivorous animal that he is.