[angst_ridden]

Of course, the Space Shuttle (and SLS, for that matter), are bad designs and inefficient not because NASA teams design them that way, but because of the way Congress funds things. They add mandates, and require the contracts to be spread across lots of organizations and states to "budget proof" the projects.

For example, NASA's original space plane was a much better design that the shuttle, but they were forced to make it a joint project with the Air Force to get budget. The different requirements added up, and eventually we got the system we've all seen.