I think it would have been more interesting if they spent any amount of time exploring the causes. Such as basic life sustaining tasks being easier so there are fewer distractions from trauma. Or feedback mechanisms around effort, success, struggles, and triumph are reduced compared to a hunter gatherer. Etc

And our being adapted to many of those struggles - it's a rare person that won't be happier walking 10 kilometers a day compars to walking less than 1. Or happier seeing 1000 trees a day rather than just walls.

I agree with you.