BoJ is buying 90%+ of their own bond market.
Emerging markets are blowing up routinely, most recently Argentina.
Australia and Canada have their own issues.
The U.S. isn't perfect but it's comparatively safe with a large military and reserve currency status with positive interest rates giving them room to react short term.
(Edit: To be crystal clear, this relative safety on the world stage means the USD is in demand as a "flight to safety". Same can be said about Treasuries, which is why domestic economic analysis doesn't necessarily align with the recession indicator of an inverted yield curve. The world could be going into recession. It's also worth noting that Gold has been rallying in USD terms, which tells us it's even safer.)