Originally Posted By: bepperb
The whole reason the lows, and fogs turn off with your high beams is so that your eyes don't adjust to the bright foreground and reduce the length of your view.
Correct.
Your eyes naturally focus to the nearest source of light. This is exactly why the low beams and fog lamps are turned off when the high beams are on. If you high beams are on, you should be looking at where the light is... far down the road, not just over your front bumper. This is also why it's not a good idea to leave your fog lamps on all the time. All that foreground lighting causes you to look directly over the bumper. Fine in bad weather when you're driving slower or trying to reduce glare, not the best plan when it's clear and you're at speed.
Most cars will illuminate low and high beams during pass-to-flash, but this is intended to be used in a temporary situation, which is why the stalk doesn't lock into that position.
The only situation I could see turning on the high and low beams as an advantage would be during off-road excursions, when you're driving slowly and just trying to throw as much light out as possible to see the trail ahead.