Exactly! Netflix is already paying for the upload bandwidth they're using, and Comcast customers are already paying for their download bandwidth. That should be the end of it. The problem is, because of services like Netflix, more people are actually using the bandwidth they're paying for. Comcast takes issue with this because they can no longer massively oversell their infrastructure.
Why should Netflix pay disproportionately more for its bandwidth than a non-video streaming service?