Ask a lone pilot who’s flying at night while monitoring three or move MFDs and trying to acquire his target. Usually, intense focus is maintained during on that MFD and not on the periphery.
Unless, of course, you believe Clinton (and the pilot) had the kind of information and skill to target a specific train at a specific moment at a specific place.
The mission planners could have checked the commuter rail schedule, or arranged to attack that particular bridge on a Sunday morning.