Getting hit from behind is the least common type of collision for a cyclist. They're much more at risk of collision at intersections because of the misguided keep as far right as practicable law that's in effect in most states.
Most states model their traffic laws after the UVC (Uniform Vehicle Code). For the keep as far right as practicable law when traveling at less than the normal speed of traffic, the UVC lists several exceptions to that requirement.
One is the substandard width lane which is defined as a lane that's too narrow for a cyclist and motor vehicle to safely pass side-by-side within the lane [1].
Given that most surface street lane widths range from 10 to 12 feet, they're not wide enough for a motor vehicle to pass a cyclist safely while remaining in the lane. That means that, for all practical purposes, the keep as far right as practicable requirement is an exception rather than a rule.
Why is it that "someone will get hurt doing that" is acceptable when discussing a bicycle on the road doing 20mph, but no one ever seems to accidentally run into farm implements or construction equipment traveling on the road at 5mph?
Heavy equipment is heavy and poses a lot more risk to a car than a bicycle, so cars just plain give them more space. You can’t bully a tractor off the road with a Honda Civic like you can do to a cyclist.
I can tell that you are a bad driver. Lots of the biking I do now is in the situation you describe, and it's no problem at all for 90% of drivers. They learned to pass slower vehicles safely. You didn't, but it's not too late!
I don't think you live here then? Naer the mountains it's dangerous to take your hands off the steering wheel because there are so many curves, passing is an extremely dangerous thing to do no matter how slow the biker is going.
I'm not against biking (I say get rid of the cars and figure something else out together) but the fact is some rural areas lack the infrastructure to make it safe for bikes and cars to coexist.
I've lived in the mountains before; actually I've lived above 10,000 ft. I get your meaning on taking one's hands off the steering wheel, although I reckon lots of people would say that's always somewhat dangerous. On mountain roads, where there aren't dedicated passing lanes, generous shoulders, and long straight sections between switchbacks there are often occasional pull-offs for slower traffic. Cyclists use those, and often get off the road to let others pass even without those. Certainly that's the case everywhere I've seen in the mountains.
Although perhaps you're not really talking about mountains? Elsewhere in this thread you seem to be talking about narrow defiles through hills and curves in some impossibly remote location. If we are to take you at your word, the roads you're driving aren't actually suited to automobile travel, and certainly not to 60mph highway-attitude automobile travel.
Cars only coexist with themselves because most drivers have safe habits. Those same safe habits allow car drivers not to kill cyclists.
