Both the headline and the HN title (which is slightly different) use "is suing"--which is a tense in English that indicates an ongoing or even perpetual action-

Both the headline and the HN title (which is slightly different) use "is suing"--which is a tense in English that indicates an ongoing or even perpetual action--in a way that doesn't in any way imply direct causality on the nested prepositional phrase "that can / does just that": Apple is, in fact, suing--and has been, for a long time now!--a startup that not only "can" "vet its CSAM tools", but "is doing just that" (which maybe itself needs explanation: "just that" doesn't mean "only that" but means something like "emphatically that" in this context).