Many of these terrorist officials remain in the shadows and only come forward for an occasional video that is to be used as propaganda, their whereabouts are kept secret as to avoid capture or assassination. The only reason the United States Government and its allies found Baghdadi was because one of his relatives went turncoat. 

Mohammed Ali Sajet, who was an ISIS member for several years and is related to Baghdadi, gave the key intel needed to locate Baghdadi. The information went through the Iraqi government where it was handed off to the US after his location was discovered the raid began.