mayonaise said:
Describing a person as expert in X does not imply he only does X.
I am not an expert in QM at all. I took two semesters of it compared to 8+ semesters of classical mechanics, electrodynamics, thermodynamics, solid state, and optics and computational physics.
I'm an expert in neural systems because it's what I eat, breathe, sleep all day, into the evening. My physics education prepared me to go down any path, yes, but it doesn't allow me to go down all paths at once.
The thing is, it is exactly the stereotypical crap I want to get rid of. These crap include that the average physicist can do anything an average engineer can do, has a broader education, is an excellent communicator... A physicist trained by a physics program is not automatically better or worse than engineers in problem solving or team working.
But the one thing that's true on there (which is what I'm supporting) is that they do actually have a broader education. Physics is at the root of many disciplines. This is a weakness and a strength, as it was already brought up.
The strength is that we have generalized and theoretical knowledge (not just of QM, of things that ME's, EE's, chemists, and biologists study.. matter, energy, and information in general). This doesn't mean they can perform any technical tasks or are intimate with every detail of every subject.
The weakness is that the generalities we think in don't always apply in the cases where several overlapping assumptions conflict. If we want to have an engineer's knowledge without taking the classes, we have to rederive it from first principles. Possible, yes, but not very probable, since it was a lot of stumbling around in the dark that got us that knowledge in the first place.
So yes, physicists do have a broader education, but it also means they sacrifice depth for that breadth.
This assumes the same area function of knowledge of course; in reality, different people also have different sized area functions covering the knowledge map, so Johnny could have more breadth and depth than Roger because of a higher quality nutrition in early developmental years and a higher quality social program in later developmental years.