The question is really what "working hard" and "investing for the future" entail. I think it's clear that many young Americans don't have the opportunity to "work hard" and "invest for the future", and even among those who do, a growing number struggle and lack confidence that their efforts will produce the intended results.
Times are changing. HNers tend to be among the more fortunate in American society but even today, a STEM degree doesn't guarantee anyone a cushy, high-paying tech job.
Indeed these are scary times. I think people are right to be on edge, and I'm sympathetic for anyone who is out of work (I may soon count myself among them). But so were the dot-com crash, the 2008 financial crisis, and Covid-19. "Outsourcing" was the big scare word when I started my career. With AI, things may truly be different this time. But it's early days, and we won't really know for sure how things shake out until we're looking back on the other side.