Why should cs and cstheory be separate? Looking at cstheory's tags I see plenty of things I encountered in my undergraduate days. It seems like splitting hair

Why should cs and cstheory be separate? Looking at cstheory's tags I see plenty of things I encountered in my undergraduate days. It seems like splitting hairs. Programmers I can understand, as it seems to be more about the art of programming as a practice. (e.g. software engineering)