If this were a traditional (before 5th generation) aircraft, you'd be correct. But in the F-35, the pilot isn't the sensor fusion engine. The aircraft software has this responsibility in the F-35. The Fusion engine in the F-35 takes in information from the Radar, DAS, EOTS, Electronic Warfare, Comm and Navigation system, and data link information from other aircraft, and tries to figure out what that information means (is that an aircraft, what kind is it, is it friendly, etc).