Hi CHris ,
thats a good point.specially for boxing stuck in a one sided stance.
The kung fu exercize as you know has many stages of progression;
We used to start the exersize off with only one stance or one body side facing out like boxing and fencing.for a few months
But would then go onto both sides
then nose to nose square shouldere so that both arms are stiking range and both are a threat
then to slight shifts in stance which would change contact range when going from square into a half facing stance so that the sublties of one handed range and two handed range are covered fully,
then it went further utilizing full footwork into full front stances in and out from square nose to nose
into full free fighting.

But you know we never covered the dominant or the weaker eye