Caring about future wasn't that popular among kids anyway, but when everyone kinda accepts that the future should be sacrificed on an altar of a line going up, it's even harder to care. We're going to burn last available resources and warm planet until we can't grow crops anymore, so we can generate bad videos of Will Smith eating spaghetti. Who the fuck cares about long division or mitochondria when the most popular occupation in 2050 is projected to be "water refugee".
Sure, it's a doom scenario, it's not guaranteed, we can somehow persevere, humanity always does. And even in the doom scenario It's not impossible that we'll conserve the civilization in some form.
What we have lost forever is the trust of our kids, that ship has sailed. When Greta Thunberg asked us not to destroy the planet, the collective response was mockery, anger, and pedo threats. There is a generational disdain bigger than it was for boomers.