Sorry, but don't think you answered anything at all. From my own experience and anecdata, software development workflow is not as clear cut as envisaged by git

Sorry, but don't think you answered anything at all. From my own experience and anecdata, software development workflow is not as clear cut as envisaged by github's definition of what constitutes "elegance" or "good solution", but by the constraints faced by the development teams and their internal working framework. Here's the kicker in your reply, retaining the upload functionality (for images, which can be large in the MB size as well), but removing it just for binaries makes no sense to me.