It’s more for running and carrying. Humans are at least in some instances exhaustion hunters. We will chase prey over long distances. The way we run makes exten

It’s more for running and carrying. Humans are at least in some instances exhaustion hunters. We will chase prey over long distances. The way we run makes extensive use of that muscle to push us forward. We also need to carry stuff over long distances: our helpless babies, food, and later in our evolution packs full of tools and basically camping gear. Lastly, we are the only species with Sir Mixalot.