This isn’t a political issue, it’s contract law. Bondholders have secured debt. Why would they accept any deal outside of bankruptcy court, unless it benefitted the bondholders?
Sounds like you advocate the “What’s yours is mine, and what’s mine is mine” position.
It is not like the bondholders own anything at all here. All they have is a claim against a bankrupt deadbeat who can't pay. They want the US treasury to pay them instead, and they want to dictate how much, too. To hell with them.