The US will continue to carry a debt load. With inflation and a sub-3% borrowing rate, it's essentially free money - we pay $400B a year in interest to access $30T. Again, we've done this for hundreds of years; it's not gonna suddenly stop being a functional bit of monetary policy.
By the end of my loan, my mortgage payments will be worth a lot less in real money, too - $1k ten years ago and $1k twenty years from now aren't the same. Creditors price this in from the beginning, whether it's my mortgage or a trillion dollars in US government bonds.
> pretend there is a meaningful difference between not paying off all the debt and defaulting on debt
This is just a silly statement. I don't think we can have a rational conversation about monetary policy if you think that.