They probably don't, but they probably had some people internally pushing for this, and seeing how it likely wouldn't cost them much but had the potential to generate a lot of good will and potentially increase demand for their product. Why would they not do it?
Not that it's much of hinderance these days but it will make the knock-offs easier and quicker to produce, and of a higher quality. I know the controllers are assembled in the US[1], don't know if the injection molding is too.
