It's less fair, though, to say, "Nobody knows with what will happen next, therefore X will happen next," as the grandparent did. Surrounding the argument from uncertainty with a few popular talking points doesn't make it any less fallacious.

I see the grandparent as pointing out Cause-and-Effect more than one of uncertainty, or simply dismissing volatility as media-fodder "political gamesmanship" as your response seemed to imply. I think there is a significant amount of visible actions and structures in global and US finance which indicate that yes, we have entered into conditions that refuse to abide by 'traditional thinking' on how to solve problems. Thus, I agree with the initial postulation that it is appropriate to be fearful of the conditions at present, built up over many years of other decisions, which may not be solvable by the same actors thus far.