Economies rebound remarkably fast if governments get out of the way, but that’s a big “if”.
True and false.
It is probably true that if they had done nothing during the Great Depression we might have naturally returned to full employment late in the 1930s.
The problem was, by the time Franklin Roosevelt came in it looked as if our government might collapse. Roosevelt did most of the things he did out of a belief that if you didn’t then the system would fail. The New Deal was not about restoring hope to America or in of that other BS. It was about one thing and one thing only. Preserving public order and preserving the government of the United States of America. Let no one tell you any different.