The problem with the analogy is that aviation has no equivalent to "maintain a safe following distance" or "pull over and come to a stop". If a plane is on an active runway, or in flight, it's generally compelled by physics to keep moving forward one way or another. An automated system that prevented the truck from entering the runway would have been great, but an automated system that falsely reported a truck on the runway might have caused a disaster by forcing the plane into dangerous maneuvers to avoid it.