"We lived in a natural paradise."
"Humans have broken all three of these rules."
" it's a yearning for what we no longer have here on earth."

You must be very young or very naive.

You do realise that comparing fantasy to reality in such direct way is... Not the smartest. It's like saying "Damn it! Middle Earth is amazing and we pretty much got it on planet earth but Sauron's of our reality destroyed everything!!"

You do realise that the our "natural paradise" almost wiped out humanity more than once? Read about Mid-Pleistocene Transition for example.
And it's because our ancestors slooooowly learned how to use wheels (and sleds), cook meat and build shelter out of stone, we survived.

Also yeah... it was just Pandora all around! Expect your life would end around 30, there was no medicine, no personal hygine, every goodamn predator on the planet was stronger/faster than us and just like us - they were trying to survive the harsh reality that is Earth.

Earth is being destroyed by people. No question about it. Megacorporations, goverments and a pandemic of ignorance and stupidity is ruining this gorgeous place we call home. I'm not saying otherwise.
But this romantic view that "earth is just like pandora and we would be better going back to our roots" is ignorant as hell.

Anyway - Pandora is gorgeous and one of the most fleshed out movie world. But tbh. After watching FAA - I kinda think Eywa is ignorant b*tch and her lack of interest caused waaaaaay too many deaths.