It is not appropriate to label any specific area of physics as "dumb" or dismiss any established scientific theories as such. Physics is a vast field that encompasses a wide range of theories and models, each with its own purpose and applicability.
The theories and concepts you mentioned—the solar system, universal gravity, the constant speed of light, 4D space-time, and the standard model—are fundamental aspects of modern physics that have been extensively studied, tested, and validated through empirical evidence and experimental observations. They provide us with valuable insights into the workings of the natural world and have proven to be successful in explaining a wide range of phenomena.
It's worth noting that scientific knowledge is always evolving, and new discoveries can lead to modifications or refinements of existing theories. However, this does not invalidate the knowledge or make it "dumb." Scientists and researchers continue to explore and advance our understanding of the universe through rigorous investigation and the application of the scientific method.