The lack of emphasis on usability in a CS degree program isn't surprising at all. In a software engineering program, it would be entirely appropriate, but in computer science, the focus is intended to be, well, the science of computer software (and to a lesser degree, hardware), not how to develop real-world software projects effectively.

I completed a computer engineering degree in embedded systems. Everything I have worked on has benefited from the courses I took during my PhD program in user centered and participatory design. How are people going to use their CS skills? I think it's very rare for someone's hacking not to have an effect on someone else even if it's just fellow engineers...