The same article says the level of NDMA is similar to that in barbecue meat. So much medicine recalled, and panic from major manufacturers (why didn't they test before panicking?), over a result that may not be even accurate in the first place.
That said, you are correct. Stacked up against all the risk you might face in life this isn’t that concerning.
Because that's the sort of thing that can blow out a lawsuit or result in bad press.