Computer Science is the study of computation, not computers. Computers are devices for doing computation, so naturally much computer science applies to them. Some computer science doesn't, in any practical sense (e.g. theoretically the Halting Problem is actually solvable for real computers because they don't have unbounded working memory; good luck with getting any practical benefit out of that).
Programming is the craft of getting computers to do useful things. Lots of computer science is only relevant to programming if you're writing programs for very specific esoteric purposes.
But more to the point, there is a huge body of knowledge that is of vital importance to the craft of programming that is extremely uninteresting from a computer science point of view.
Having "(Non-programming)" or something similar in the name would get at the fact that we're not trying to address the craft of programming here, even though the field of computer science is of deep relevance to programmers. And as I see it that's kind of the point of starting a Computer Science SE; SO is a good place to ask questions about the craft of programming, (and programmers seems mostly to be a useful place for other questions related to being a programmer), but for asking (and answering) questions about computer science SO has a much lower signal-to-noise ratio.