you used an example of an obviously idiotic driver and had the bad grace to cut my quote. Very poor form
I quoted someone else quoting you. Quotes are always cut, that's the point. It's whether it changes the meaning, or perhaps highlights a part you'd rather wasn't highlighted.
The driver was doing something that I see everyday - i.e. overtaking without being able to see if her way forward was clear. In her case the consequences were devastating. Other drivers get away with it, forgetting that there is always the possibility that there will be devastating consequences and that that is the reason for that rule in the Highway Code.
If there is a long and straight portion of B road (2 clear lanes). I overtake the horse at 10mph in the opposite lane but the horse spooks at a crisp packet and jumps into my car, is your excuse "there but for the grace of god go I"?
No. He's really not that athletic and can't make it across that great a gap in time. He's not keen on flappy things but he is more wary of traffic so would be fully aware that you were there and wouldn't want to be near your car. Also, I'm aware of how a horse's vision works and generally make sure he sees things out of his right eye and therefore if he spooks, he's going to go left into the hedge.
The only way he'd end up on a car bonnet is if they were too close, and too fast to brake effectively in time. If you leave a car's width and pass at 10-15mph my horse is not going to end up on your bonnet for the sake of a crisp packet. Before I got him he had an accident on the road. I've spent a lot of time desensitising him with the things you commonly see out and about. He is well schooled, responsive to me and good with most traffic.
Horses aren't some major threat to road safety. Riders tend to emphasise their unpredictability to try to get drivers to back off but really I think on this thread that's been overdone. If a dog jumps up at a fence, barks and rattles it, my horse might go 6ft sideways BUT generally I'll have spotted the dog, got the horse well in hand, and flagged down any traffic nearby. If as a driver you're listening, considerate and able to stop in the distance that you can see, this will not present a danger to you.