The by-pass is a great temporary work- around and will work every single time for a stuck activation switch but is tough to do on the side of the road. It takes a little fairing removal, some wire splicing (ideally soldering) and then covering the soldered joints (again, ideally with shrink tubing). It is not really meant to be an emergency procedure. Then again, if you are stuck, I guess there is plenty of time to do whatever it takes to get going again. As you mentioned, you could just cut the wire and twist it together although there is not much wire length to work with there and it is about impossible to reach without taking at least the black fairing cover off.
Just to pass along a better understanding, this by- pass does not address the activation switch directly; those wires do not leave the ignition switch housing so they are not available to be cut, tapped into or anything else. The wire being cut is actually a CANBUS ground for the activation switch but it absolutely will do what is needed to get the activation switch and, especially, the entire bike up and running again.
Just out of curiosity, I wonder if the original poster can provide some info. about the bike that is stuck- what year, how many miles approximately, etc.
Brian
LOL I had hoped you would show up to shed light on this. I have never done this little trick.