I'm not sure what you're thinking of in particular, but I'm guessing that most talk about cybernetics in modern philosophy is derived from Heidegger's claim that in modernity, we lose any an ultimate referent for our chains of signification. Everything gets taken as for the sake of something else (e.g. as a resource to achieve some ends extrinsic to it), but there is no final "something else" to make it all meaningful. The reason he calls this "cybernetic" is because it deals with unending loops instead of the sort of hierarchical organization we might have seen in pre-modern times (e.g. with God at the top of the tree of meaning).

Philosophy often attempts to dip below accepted meanings and systems of thought. This may make it seem like philosophers "have no understanding of the technology they're trying to discuss", but in fact they aren't necessarily discussing technology in the sense which one might assume. They're trying to get at a completely different strata of thought than the "how-to" of any given technology.