I understand the point you're trying to make, but transportation cost is not really a relevant point here.

Food of any variety can be locally produced, or it can be sourced through industrial supply chains. Animal and plant products can both have an embedded cost in terms of carbon emissions, water, and usage of arable land. That is to say, a cow, a chicken, and a bunch of potatoes can all be locally sourced, and the costs of production for the cow are going to be much higher.

Moreover, the food we "evolved to thrive on," was likely primarily nuts, seeds, fruits, insects, rodents, and occasionally larger animals like antelope (which would have been eaten nose-to-tail), not fatty steaks from domesticated animals.