In a points ignition there is a resister used to keep the points from burning up. The resister does get very hot. The points completes the circuit when they are closed. Even though the resistor may reduce the voltage by half, or more. leaving the key on, when the motor isn’t running, can still damage the points. It doesn’t do the resister any good ether.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.