Morris and Hovind may not have done original research. But would a researcher not draw upon the findings of others? Galileo and Copernicus no doubt used findings made by astronomers who believed that the earth was the center of the universe. However, their conclusions differed from their predecessors. Darwin probably utilized works of advocates of creationism as well as those who held to pre-Darwinian theories of evolution.
If Morris and Hovind are in error, it would be in the lack of reasonability of their conclusions.