[asdff]

That's kind of just how cars work in general even outside of software. I put in the oem fog lights in my old car. All I had to do was basically screw through a plastic bracket in the grill that was installed at the factory specifically for the lights, plug in the lights into one end of the harness that was already in the car, pop out the preinstalled plastic cap in the dash and pop back in the fog light switch after connecting it with the other end of this harness that's already there near the button, routed through the firewall for me. The fuse was even already there in the fuse box for the fogs.

Basically everyone with this car is paying for 95% the actual hard work of what you need for the fog lights already. Very few owners end up going for the fog lights but everyone subsidizes their installation.

[kevincox]

You can also look at this the other way. Most people don't value the fog lights, so the very few owners pay the cost to install fog lights in every car because it is cheaper than creating a separate production line. So you are "cheating" the system by taking advantage of that hardware without sharing the cost of it.