People a lot smarter then you and your pony boy have spent their entire working career designing flight control systems
Yes, and those people all work at Boeing.
if it wasn't safe, the airliner would not have been certified for passenger travel.
You're use of faith to try to fill ignorance is not a logically sound method of filling ignorance.
"I'm sure somebody thought of everything," is something that stupid people think as they sit in the protected cradle of mechanisms that people smarter than them have come up with. Smart people, OTOH, know just how difficult it is to think of everything, and we are quite aware that sometimes we just miss shit.
The A320 uses the same control scheme and statistically it is the safest airliner in the world
And how many crashes would it take for it to lose that by a wide margin?
How many near misses has the A320 had because of this, where there was momentary confusion in the cockpit caused by both front seaters trying to input flight commands? We don't know. In a non-emergency situation the pilots would be able to figure out relatively quickly the point of failure -- two hands on stick -- but in an emergency how do you tell the difference between wonky controls because of averaged controls and wonky controls because of mechanical failure/unexpected aerodynamic forces?
Asynchronous averaged controls places a huge hurdle right in a pilot's troubleshooting path. If you are testing the bounds of an aircraft's response, deflection right has to equal airplane "roll right", left has to equal roll left, up has to equal up, down has to equal down, left rudder has to equal yaw left, and right rudder has to equal yaw right -- all in a 1:1 relationship. It is the variance from 1:1 that you would use to tell you there was something wrong with the aircraft, and you would start thinking, "What would make it not respond correctly in the exact manner it just did?" But with averaged controls in conflict it IS responding correctly -- it's just your concept of "correct" is wrong because it's literally out of your hands; the averaging program is making the determination of the "correct" control input and it's simply not telling you what that is.