Guess that back in ancient days, if the king or Emperor started talking sophistry, they could get away with it, as his subjects do not dare question the words from the Emperor. Even if the words are sophistry or he has no clothes on.Today that won't work with mass communications and social media.
It is really bizarre that an American official would say something like this.
Is Yellen speaking her own opinions? Is this US government official position? Are they fishing for other countries to give support?
Does not matter. Business goes on.