House wiring compared to 12 volt is messed up. I always tell people who know nothing about wiring that 12 volt DC runs in a circle and has positive and negative(red/black, black is a negative color). In vehicles negative is connected to ground/the frame.
AC house wiring doesn't run in a circle, it sloshes back and forth(basically) through the black and white wires.
I'de much rather deal with 12 volt stuff.
What was really fun was the wiring I put into my little camper that @Sisco has seen. All the outlets are duplex. AC to the top plug, 12 volt to the bottom. DO NOT plug a 12 volt light into the AC plug! Child cafety caps installed in whatever plug is not being used.