Probably because naturally one generation will be dying off at a greater rate and the other is growing up in tech. The better question might be; Why would you slight gen Z with the comment, "sounds about right for the instagram / tiktok generation."? Don't you realize you've turned into your grandparents who complained about your atari/nintendo/star wars generation?

IMHO though, I think both generations were kinda right. For decades our focus on what's cool and fun have distracted us from civic and personal financial matters that have allowed corporate America to thrive at the expense of our people. We 'respected our elders' and they screwed us. But I'm just a grumpy ol fuddy duddy.