[schoen]

That's not impossible, but the pilots' limbs are already largely "spoken for" by other controls and tasks, so it would be a harsh tradeoff.

[jamesrom]

If other controls are being actively engaged by the pilot, the need for the button press would be delayed only until there's some continuous period of non-engagement.

[bombcar]

Exactly - something like positive activation every minute of some control or another or it starts hooting.