The overall purpose is to achieve more current and voltage flow.
I left stock wiring in a 1999 blazer a few years back and had dimming and voltage drops like crazy running smaller amps then I have now. I added to the wiring in that and it fixed the problem.
I've read it does and doesn't help, but in my experience is has helped. I plan to upgrade my alt and batt, as well as another batt in the truck. I'm running a AQ2200D thats 2200 RMS and a mb quart 4 channel thats rated at 125RMS x4 @4 ohm.
I never ran this setup I have without the big 3, so I don't have a comparison, but I believe what you're saying.
and you're NOT being asshole, I see your point. I just have the wiring laying around so I figured why not.
