Responsible disclosure, despite it's name is often not the most responsible course of action to take. And in any case, what does the FBI even have to disclose

Responsible disclosure, despite it's name is often not the most responsible course of action to take. And in any case, what does the FBI even have to disclose here? An exploit that they may or may not have that wold undoubtedly be contractually obligated not to share. In any case, everyone already knew that the crypto on that particular iPhone model was broken.