That is the difference between commuters and drivers, commuters just fill gaps, cut to the shortest lane in front of them, dont see or care about other road users. Drivers on the other hand read the road ahead, have minimal lane changes by looking well ahead to see which lane is flowing, exercise the zip method of merging, allow people in front of them as we can see what they are trying to do anyway, and generally act responsibly, which also means using less fuel and brakes by driving much smoother.
Most truck drivers and bike riders play a game with themselves predicting what the cars in front will do, which lane they will hop to, which exit they will take etc. that's because we are drivers, and it is surprising how often we guess right, just by watching the commuters 'attitude' on the road. This also helps us get to where we want to be, because we know what the commuters are going to do before they do!