The argument against would be that 2.7M articles containing no useful content is not helpful. (Assuming, which I do, that the articles do not contain useful content).
After reading that I know that Bouteloua repens is a form of grass. Who first identified it. Who gave it is current name and some other common names for the plant.
I think it is amazing.
If someone has already filed in a the information it just seams like a waste of man hours to retype it to Wikipedia.
Seems fine to me, and sounds like it's likely to be adding value.