Why would he? I’ve been hearing concerns about national debt my whole life (including the 80s when interest rates were a hell of a lot higher than now), and I’m retirement age. I’m not saying those chickens won’t eventually come home to roost, but probably not anytime soon. The U. S. has become quite skilled at giving that tin can a swift kick down the road.
Because paying the interest on the debt is now the fourth leading cost of the federal government, and since we are running an ever-increasing deficit, it will only grow.
The OBBB, championed by the so-called "fiscally conservatives", accelerated this, but this will largely get ignored until/if a Democrat is in office again. Then large swaths of people will suddenly start caring about the national debt.