I do not want to be in the position of defending Comcast (who I hate with fiery passion), but that sounds a bit like arguing that the cost of manufacturing an Adobe Photoshop disc is relevant to how much it can or should cost.
Talking with friends in the that work at backbone companies. One of the funny stories I remember is the sales people having issues making sure that they actually charged more money for higher bandwidth connections due to some internal issues they almost set the prices for OC-12 lines (622 megabits) below that of OC-3 lines (155 megabits). As I understand it internally OC-3 lines where costing them slightly them more to deploy at the time.
I do not want to be in the position of defending Comcast (who I hate with fiery passion), but that sounds a bit like arguing that the cost of manufacturing an Adobe Photoshop disc is relevant to how much it can or should cost.