Yes this does look like Rudbeckia Gall Midge (Asphondylia rudbeckiaeconspicua). They are a nuisance, but they don't hurt the plant as much as you might think. Removing the galls and destroying them is usually the best control method. The midges have natural enemies and their populations usually go down over time even when you take no action. The midges are part of the food web and nutrient cycles that keep all of our ecosystems functioning at their best. Certainly from a human perspective there may not be a whole lot of value that you could assign to a gall midge like this. However, I'm sure if you asked them, they would disagree.