Say you’re driving down a very desolate, flat straight road out in the middle of nowhere. You can see far ahead and far behind you for miles. You’re also driving with a friend who is driving their own car. For whatever reason, you wish to drive parallel to your friend, so you hop into the oncoming lane, and begin driving right next to your friend.
Eventually, in the distance you see a car coming. What do you do?
Obviously, you let off the gas, and get back behind your friend, or space permitting, you apply the gas, and get in front. Otherwise, you will end up in a head-on collision, and probably someone ends up dead, or at least severely injured.
If the answer is so simple when it comes to driving cars, why is it so difficult for people to grasp when simply walking?