You seem to be inferring that we Americans are too soft and like our comforts a little too much and if so I do agree with you on that.
But I have to strongly disagree with you about adding stress. I was getting some training in a sail plane and we hit an updraft and my instinctive reaction was to immediately push forward on the stick. The instructor asked if that was intentional or not and then explained that what I had done was a very good thing. When you hit an updraft it puts more load on the wings and by pushing forward on the stick I decreased the AoA and thereby reduced the lift they were creating and also reduced the load on the wings.
Let's just say that the system I proposed is possible, it would probably be more accurate to call it a "Lift Damper" instead of a pitch damper since it's not connected to the elevator. If such a system were installed and reliable if you hit an updraft it would deflect both flaperons up reducing lift and load on the wings, making a smoother ride and not beating up aircraft or occupants as badly. Obviously you can get into situations beyond the capability of the pilot and/or aircraft, but for our purposes we'll just assume conditions aren't too bad.
Also one other factor for me is that I have a KF1 which weighs about half of what yours does and so gusts are a much bigger consideration for me.
I wonder if one of the reasons modern cars last longer is due to better suspension? The car simply doesn't get beat up as badly.
I am looking at rc gyro stabilization. That will be interesting to play with.