To be fair to Mike Holmes, when he arrives he usually finds the overloaded panel with branch circuit wires passing right through the 'service' side, and there simply isn't enough wire to reroute the wires around the box and in the side.
By 'overloaded," I am referring to there being too many circuits in the panel - double tapped breakers, too many 'skinnys,' dedicated circuits being used for other tasks, etc. I am also given to understand there is a CEC requirement that the panel be installed with at least two unused spaces.