I'm not sure what you mean by graduate physicists being "judged" by undergraduate physics, but most of what is taught in undergrad physics--Newtonian mechanics,

I'm not sure what you mean by graduate physicists being "judged" by undergraduate physics, but most of what is taught in undergrad physics--Newtonian mechanics, optics, and gravity; Maxwell electromagnetism; the Bohr model of the atom, etc.--is sort of "wrong" in that it is an abstraction or simplification of the underlying theories that professional physicists spend their time considering and testing. If someone told you that they are a professional physicist and you said "oh, so you time pendulums and drop various objects from heights and build simple circuits," (common in undergrad physics labs) they would probably look at you funny. Undergrads simply don't have the math to do "real" physics. Even Feynman couldn't change that. He tried to build an intro to physics course around "real" physics, starting with the electron, but he ultimately judged his effort a failure.