Ook, it’s tunnel vision. People focus on a specifc area and items that are slightly left/right/up/down from that are invisible. You can be in the middle of a three-lane highway with someone right behind you and the other two lanes are empty. That person will not move to a different lane and will keep driving close behind you for miles. However, if you change lanes, they suddenly see the open space in front of them and then they will accelerate and pass you.
I’ve even seen this in other situations. People look at an object and they can’t see a specific point because it’s one inch to the right of where they’re looking. Makes doing phone support much fun. There’s times I’m like that, so I don’t gripe about it too much.
Regarding the people behind your car that are too close behind but won’t make a lane change on their own, they’re relying on you to protect them. “I don’t have to watch the road ahead because the car in front of me is doing that.”
I’ve seen too many examples of bad driving to trust anyone else for my safety. If I can’t see the road ahead through the windows of the vehicle in front of me, such as they have tinted windows or solid doors, or see around the sides of the vehicle, I move to a different lane.
Good advice about driving I saw on a website a long time ago: “People are idiots and they are actively trying to kill you.”