That is the most strained rationalization I have ever heard. Yes, people did listen to FDR on their radios after he was elected president. And perhaps some of them visualized him speaking.
That does not excuse this: "When the stock market crashed, Franklin D. Roosevelt got on the television and didn't just talk about the, you know, the princes of greed. He said, ‘look, here’s what happened.’"
Biden was not vague about what he said. He also said it in his fake authoritarian voice that he uses to emphasize a point.
https://www.youtube.com/watch?v=EP-5X_1N3dw
It took awhile to find this YouTube. It used to be easy to find before Biden was selected president. I guess it violates YouTube's communist...oops... community standards