[kakwa_]

Different contexts and not really comparable.

1) The whole airspace environment is heavily regulated (ATC, rules, etc), cooperative (think transponders or TCAS for example) and usually quite sparse (several miles between planes).

2) Pilots are regularly trained and evaluated for these kind of take over in case of emergency.

3) You have two pilots monitoring each other.

4) The development cycles for these automations are far longer, and the QA a lot stricter.

5) At least in the most critical phases (take-off, landing), the automation is not exactly end-to-end. It's more the case of grouping batch of steps together into bigger actions to reduce the load on the pilots. The pilots are still quite busy during these periods and very much in the loop.