Well, that's true, but some people also have an attitude of "if it didn't happen to me, it didn't happen".
Your grandparents went through the Spanish Flu? Well, Dad, we had Covid.
Your parents went through the Great Depression? Yeah, well, we had 2008.
Your parents had World War II? You had to worry about being sent to Vietnam? Yeah, that's nice, I guess, but we had 9/11, Afghanistan and Iraq.
And I'm not just mocking the youngsters. The things that happened to other people are less real to us than the things that happen to us.
The Spanish Flu, the Great Depression, and World War II were objectively worse than Covid, 2008, and 9/11/Afghanistan/Iraq. Far worse, in every case. But most of us didn't live the worse things. At best, we've heard about them. The more generations removed from them we are, the less the stories seem real.