Earlier quoted context omitted.
Because air travel is ridiculously safe. The incident with the helicopter and the plane is making the rounds precisely because of how insanely improbable it is, and even then from what we know, chances are the error was in the helicopter, not the tower.
A plane and helicopter over DC came within 500' of each other over DC barely 24 hours before the crash. They avoided collision because they were over 1000' and the TCAS was still active: https://www.youtube.com/watch?v=huVFZ__q2rI During the day the only thing that was keeping those collisions from happening under 1000' was pilots seeing each other. At night the only thing keeping it from happening was luck. The erro…
No. The RPA4514 had the helicopter insight. Pilots are required to follow TCAS RA regardless of ATC instructions or if insight.
What makes you think they would have collided if TCAS hadn't alerted?