Technically, that is correct up to a point.
While those bonds are set to mature, which means buyers of such bonds can get their funds back, USA revenues are huge & can easily return those sums, even $9 Trillion. Just GDP alone is $29 trillion in 2024...
Furthermore, the FED has far more Trillions in their vaults, gathering dust, not just from those whom bought those bonds years back, but much more thru yearly issues NEW bonds, let alone its Gold reserves....
For those whom fear about US treasury notes/bonds, USA had never defaulted in its payments, unlike other countries whom not only defaulted, but even SEIZE saving funds from depositors from banks....
With lesser US Treasury bond issues, it only means lesser interests to pay for such bonds from govt revenue. Should the American dollar drops, it would mean MORE American entrepreneurs would be able to export to other Markets Worldwide. It is a resource rich Nation & needs no imports.
In the end, USA loses nothing. It is a power HOUSE, based upon its democratic principles & way of life, Rule of Law, talented & innovative citizens built up over 200 yrs..