Trade deficit is just as much an indicator for foreign sentiment to hold US cash, as it is to import non-US made stuff.
All that indicator says is that consumer behavior changes during a recession.
You can argue the same thing with private debt.
https://tradingeconomics.com/united-states/private-debt-to-g...
https://www.econlib.org/library/Columns/y2017/KleinBoudreaux...