Some of us like to keep cars as they were, the shortcomings make the car. Why butcher perfectly good wiring when you can just plug something in and it works simply.
Sorry, I've lost count; how many people who know more about this than you have told you you're fulla bulk wrap about "butchering" or "ruining" wiring? You're still gonna be wrong about it, no matter how many times you repeat it.
Also, which is it? You like to keep cars the way they were (=sealed beam headlamps and no point participating in this thread), or you want to change the headlamps to something other than the car came with (=be smart about it and remember that guesses, assumptions, and oversimplifications aren't the same thing as facts).
