Hunter gatherers didnt know what chemicals to mix to create a battery, or use that battery to power magnets, and that if you power them in the correct order you can spin things, and with spinning, you have our modern way of moving energy.
I also lift weights, likely unbelievable weights that couldnt be sustained for a hunter gatherer due to lack of food.
Size doesnt matter as much as environment. I have an abundance of food and information, while this was scarce 10,000 years a go.