The article is very limited as a history of the Great Depression - it says very little about why the economy got worse and better and does not include key words like "deflation", "gold standard", "Federal Reserve", or "monetary".
One of the first things that Roosevelt did as President was to take the US off the gold standard (to put a stop to the deflation), and that was probably the most important thing that a country could do to deal with the Depression. See, for example, this graph, this section of a Wikipedia article, or this (much longer) Economic History Association article.
Still, if Hoover's policies weren't all that different from Roosevelt's, and most of Roosevelt's didn't make all that much difference, that's quite different from the usual account.
Also, is it true, as claimed in the article, that WW2 got the US out of the Great Depression? This has never seemed plausible to me (get richer by doing a huge amount of non-productive work?), and wars don't usually seem to be great for the economy.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.