They know the US economy is much more fragile than the rosy outlook being broadcast by major news outlets (I concede it is somewhat important to keep dumb asses buying

they don’t need and can’t really afford).
At the end of the day, they’re asking why a supposedly historically strong economy is completely dependent on artificially low interest rates, and they are banking on the next recession hitting (just by the law of averages since the end of WW2 we are long overdue).
When it hits, what arrows are going to be left in the economic quiver? Lowering interest rates, cutting taxes and deficit spending are completely played out.