I'd rather pull the C/B and not die from a runway that can't be stopped by the switches.

If you pull the wrong C/B so what just push it back in. There isn't much on that airplane that there aren't 3 of.

From what I recall the background of this is a few challengers had trim run aways that were caused by corrosion on circuit boards that caused electrical shorts. The theory was it could potentially disable the disconnect switches. The only sure fire way to kill the run away was remove power from the system.