This is one of two last-resorts mechanisms by which the U.S. will maintain its hegemony. It may suck, but it is way better than the alternative.
Why is printing money a bad thing at this point in time? I see two strong reasons that printing money is the right move: 1) Wealth inequality is high relative to recent history. Printing money is a very effective way to even some of that out. Possibly the only form of 'wealth tax' that can actually be executed successfully. 2) The US debt / GDP fraction is still relatively low compared to many other countries.
This only holds if the wealthy are holding their wealth as USD, not assets. This is not the case. The wealthy do not typically have Scrooge McDuck-style vaults of cash laying around waiting to be inflated away.