The Migratory Bird Rule would still be with us if they had. I think not. I suppose Mr. Huh is trying to refer to the difficulty in evaluating, and quantifying wetland functions. Indeed there are a multitude of methods available that evaluate wetland functions and produce different results, however this is not always the fault of science. You can take the temperature of an animal, but an ecosystem is a much more slippery patient.
Natural systems are dynamic.
In the Corps defense, they do evaluate the variety of human uses and views in addition to the environmental impacts on wetland resources. Mr. Huh appears to feel that the Corps only makes decisions based on wetlands. The Corps is a public agency, which fairly evaluates the public's interest. Finally, there is no intent to offend anyone with regard to wetland knowledge here, however discounting solid wetland science, which has provided a foundation for understanding the resource, should be backed up with evidence. However, that is not the issue.