LEDs draw much less power than regular incandescent bulbs so if someone is doing it to "lighten the electrical load" but then use the resistors It really doesn't lighten the load. But like you said. I imagine most people do it for the looks
MAN I wish somebody with a newer 2011 would have some pix as I like pix to use for reference INstead of just a wiring diagram. IF I knew ahead of time every bulb would need a resistor I never would have done this -EVER.