Well being, lower stress and suffering.

Right, didn't we already have that as paleolithic times? No pollution, can just forage for a few hours and then mostly chill. Seems these cavemen have progressed farther than we have.

That works until your population has grown so much your people start illegally logging protected forests for slash and burn agriculture because they have nothing to eat. The conventional solution is natural predators for population control. We have to do population control in our head.

I think there are many obvious holes in your choice of example, but your overall point stands. Let's look at America. Are people healthy and unstressed? The wealthiest nation in the world--obese, chronically ill, depressed, suicidal. If this is progress, I want whatever is not progress.

That's a myth of a noble savage, a lot of prehistoric people died in childhood, childbirth, from broken bones, had no safety etc.

Prehistoric people died as many times a lifetime as contemporary man.

What they didn't have to worry about was mortgages, inflation, losing their jobs, the destabilizing political situation in Eastern Europe, global warming, QAnon, the vanishing bees, health insurance, and so forth.

They died much earlier and more painfully and their life was full of stress.