From what I know, points ignition systems with 12 volt systems,
had a ballast resistor, or other type, usually around 1.7 ohms,
depending on the type of coil used. This was to lower the voltage,
and hence the current going through the points so they didn’t
burn up.
The generator will change the equation somewhat I presume,
when it’s putting out 13.5 volts, etc.,
I read somewhere that nine volts to the points would be okay,
but I’m currently at 10 volts.
As you have stated, the ballast resister is to keep the points from burning up in a12 volt system. However it is bypassed when starting. This is done through the ignition switch in Chrysler products, and from the starter solenoid in GM products. I believe Ford did it from the starter solenoid as well. This is to aid in starting because of the load on the system when the starter is cranking.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.