It's worse for everybody if the US misses even one debt payment.
Whenever a country has done this, their currency crashes.
Defaulting is our fast track way to be Zimbabwe.
If you think a little inflation from more debt is worse, you're crazy. Look at prices from the 70s, 80s, and 90s. The change in nominal prices isn't really what is worse now compared to then. That much is business as usual going back a century now.
A little inflation privileges the now(current production aka people living and doing stuff now) over the past (aka debts of the past).
The USA just needs to stop being Mr Nice Guy aka everybody's bitch, and start playing the game the way we used to play, because that's how everybody else plays now. We forgot about it and got caught up in crazy dreams like 'globalization' and other BS.