Sorry, Nature didn't took this course, humans have interfered in the ways of the Nature way too much.
And please note that there is no evidence that resources are limited. Resources are ample to fulfil human hunger. In fact, animal farming is a huge burden on resources and could be avoided.
I am not talking about human interfere. Natural selection is a fact in natural world. One animal is the food item for other. However, I agree with you in context of human society. As a human meat consumption is not our obligation.
I agree. Rearing animals for meat consumption is definitely a burden. Vegetarian food items consume less resources from nature while for the same amount of meat, we need 100 times resources in comparison to vegetarian food.