This is the Noble Savage. There's a grain of truth in there, though, hunter-gatherer societies in a resource-rich environment have plentiful access to a varied diet and are in excellent physical shape. But there is continuous war between neighbours over these resources (just because you can, everyone is well-fed and healthy). So, yes, people lived well and had fun while doing so.

Yep. I like this bit by Slavoj Zizek: https://youtu.be/IISMr5OMceg?t=407

This is just racism in a different form.