I care, as do my peers.
But for those of us who weren't alive, or very old, before the Good Friday Agreement was held, it's part of history and doesn't have the same impact as it would if it had happened more recently. We're the 9/11 demographic and our lives and headlines have been dominated by terrorism from the Middle East, not the IRA, and reciprocal actions / atrocities.
However, you'll find that my generation and younger are very concerned with righting past wrongs and injustices. It's just the The Troubles aren't well known outside those who lived through it. To learn about them, you must seek out information and there's a lot of history to understand. Certainly, until recently, I struggled to find concise, balanced explanations of the history and events.
There's loads of info out there now, great podcasts and books and the GFA is in the public view again post Brexit so I'm hopeful this new exposure will prompt greater education.