When I'm in middle lane there is nothing that near me, my concentration is taking over slower people than me in middle lane. I do keep a safe distance but will always disagree with you about going in and out of inside lane time after time - for one thing, some people don't even indicate they are pulling out, so I'm indicating - the car behind me soes not notice it and he pulls out same time as me
Meanwhile, if I'm in centre lane driving at a steady speed, keeping safe distance I'm a hindrance to no-one