question on bulkhead connector bypass

so here's something I'm mulling over - you got an alternator that can put out 60 amps or so (when it's is demanded). So you have a system in your old car that has few accessories, you never run the blower motor or radio, basically you are just running the car with running lights. So your electrical system is never really calling for a lot of amps to run through it. When Mr. battery eventually needs a boost, VR says send me 13.8 volts or so to get battery up to where it should be. VR then says OK, ease up on the voltage, alternator complies. My point is there is not a high amp current running through the electrical system and the bulkhead connector ever in this scenario - right? I'm thinking of why the factory changed charging system wiring for police cars and other high amp usage vehicles and other changes later on for all cars vs. the way we tend to use these cars in fair weather today with just the basics. (OK, some of you have to have A/C and big sound system!) any comments?