The head of the program was a cosmologist, actually. I know that she taught herself to code, as did the other two profs I worked for. -I think that had something to do with their attitudes. Also, it might have just been from a practicality standpoint. We didn't have the room for multiple CS courses, and the students seemed to be able to pick it up well enough to do what they needed to.
I have to mention, I did take a 100-level CS course as an elective, and personally, it was too basic. I think to get what we needed, we would have had to skip the intro courses, and I it's possible the CS department would have frowned on that. On a related note, my PhD was in medical physics, and our department did have an agreement with the bio department to let us take a 400 level physiology class without the prereqs. It was a point-of-pride in the physics program that our students always lead those classes.
No doubt CS can get deep and anyone that codes could benefit from those higher-level courses. But, I think the situation wouldn't allow for that.
Maybe she was saying that physics students were bright enough to figure out what they needed on their own. From what I saw, she would be correct there. We weren't math majors, but we were pretty able. :)