You are missing the distinction here. Sure, Gustav and Ike were at one point Category 4 hurricanes, but when Gustav made landfall it was only a category 2 hurricane. Both Harvey and Irma were category 4 hurricanes when they made landfall. Not just during their existence, but when they made landfall. Hurricane Irma was a category 4 hurricane when it made landfall and then after that weakened to a category 2, as all hurricanes do when they reach drier area. That is the distinction. But if you want to go on and believe that the reports of it being the first time that 2 Category 4 hurricanes reached landfall in the same year is FAKE NEWS go right ahead.