Agreed: leaving bike trash all over the road is rude.
Fortunately, most of us cyclists who either are or appear to be hard-core have respect for the natural environment. Sure, half the fun might be the physical workout, but the other half is the aesthetic experience - clean open roads, gorgeous landscapes, away from the crowded cities. Keeping that experience available to everyone is important to many of us, even if it means riding 30 miles with a jersey pocket full of blown tubes
There are unfortunately jerks in every group.