The literal mirror image of those people are people who are terrified of bicyclists. Whenever they come across a single bicyclist riding on the right side of the road, they give the bike the berth that most people would normally give a bus, or in some cases, two buses.
And let me just say that bicyclists do really appreciate the fact that you care about not running them over, and that's very sweet, but bikes are as wide as people. When there's a bike lane, in particular, the bike lane is plenty big enough to contain the bike, and the car lane is just fine to fit your car, so all you have to do is stay in that car lane, as opposed to veering into oncoming traffic or slowing down and driving behind the bike the whole way home.
I know sometimes there's no bike lane and the road is narrow, and sometimes there's inconsiderate bicyclists that don't stay to the right, but throwing out those cases, there's plenty of times the bike is safely contained in a big fat shoulder or bike lane, and all this driver can see is apparently some kind of whale rolling sideways down the side of the road.