Exactly. The more technical and broader hollistic look of a computers, performance is something I think a CS is expected to be mindful of. But it does not mean they all are.
I think it also depends on your drive and your niche. I am in a GIS world and am very enthusiastic about programming. Where most people are more interested in the application than in the backend. If you know your target group you can cater for them specifically and understand their problems better.
So of course it depends (as always), but to be able to program and know another field is VERY valuable I'd say. To have a CS grad in the group too, but it would serve a more specific purpose.