In all three of those circumstances the human pilots are already relays, and are not really not necessary as executors. Consider the current ATC data links suc

In all three of those circumstances the human pilots are already relays, and are not really not necessary as executors. Consider the current ATC data links such as CPDCLC. The pilots read what appears on the screen and press ACCEPT to load the ATC commands into the flight management computer which instructs the autopilot. Pilots don't land in thick fog, autoland has been doing that for 50 years. If autoland self-aborts they divert to another airport and follow the ILS needles to land there... TCAS negotiates collision-avoidance in busy airspace and generates emergency action commands for the pilots.