Ha. Nice. What is interesting about that scenario is the human would be loading up on protein (probably meat based diet) and working hard to gain that, and the gorillas sit around eating a vegetarian diet and have massive muscle mass just because.

I was gonna object that it’s a vegan diet, because they’re presumably not gonna do eggs or milk, but apparently not strictly vegetarian either:

Mountain gorillas spend about a quarter of their day eating, mainly plants. Around 85% of their diet is made up of leaves, shoots and stems, but gorillas can also eat larvae, snails, ants, and even roots, barks and rotting wood (a good source of sodium/salt).

www.wwf.org.uk/learn/fascinating-facts/gorillas

There is basically nothing that isn’t a. opportunistic carnivore. Eating meat is just way more efficient (in terms of nutrition and calorie density) than eating plants.