overthewing,
I think you have already guessed the correct answer.
Other than a short play in the simulator, I haven't flown the 'Bus but with Boeings, one would also normally make selections via the Mode Control Panel or Flight Management System keyboard.
In moderate turbulence, on occasion, I've had to use both hands to make selections, one to steady the other.
Turbulence also makes instrument interpretation a little more difficult.
IF those guys flew into a Cb then, clearly, things would be a deal worse than I've described.
Over my aviation career, even mechanical instruments became smaller in order to fit more onto a finite panel space. If I had to make a choice between 1980s mechanical instruments and a glass cockpit, I'd have to say that maintaining situational awareness is much easier with glass.
Perhaps someone with a few thousand hours on each of Airbus and Boeing could comment further. (or give the posting number if it's been mentioned already
)