One of the constants of human nature is the ability to adapt to new environments. It could very well turn out that the 20th-21st century idea of a job is less well suited to human nature than whatever comes after jobs are made obsolete. Even if that's not the case, I think we are smart enough as a species to figure out how to navigate those changes and make them work for us. It sounds like you disagree with this, which is why I think your view is fundamentally pessimistic.