That's half the problem, some cyclists are self entitled twats that give us all a bad name.
Many of the roads that I ride on aren't wide enough to do the 1.5m gap unless one of us goes I to the adjacent field. A beep alerts me that someone is there and gives me a chance to pull over a little to let them past, safer for me and less frustrating for them.
We have to share the roads so a little consideration from all sides goes a long way.
You talk to horse riders around here and they'll say cars and motorcycles are rarely the problem, it's road cyclists on a mission they have more problems with.
but if we're sharing the roads, and youre on a road you know its going to be difficult to pass, why arent you riding with more awareness of other traffic to start with ? that way people dont need to use their horn because youve already clocked them and are moving over when its safe for you to do so and where youve picked, rather than be forced into a point where you have to make space, because usually a beep is followed immediately by the pass.
I ride alot of country lanes,single track roads, some of these roads arent much bigger than the cars that people drive on them, I dont ride waiting for people to beep at me. I know some people use garmin varias as a tech solution for it, but I just keep my situational awareness going on the road, and if I cant hear, because sometimes the wind is howling around you, and hearing does go as you get older, I look more often instead, but the key is simply knowing whats around you, and I think thats one of the things pedestrians on shared paths or walkers on roads dont do that often, when they should be far more tuned in to their surroundings.
horse riders generally are as they have to be, but their horses can be skittish, and not all riders are as skilled at controlling their horses.but the horse will have clocked you long before you are in bell range for the rider, horses hearing can be quite freakish, and selective, but its more about unusual noises than sound or volume as such horses react to. But you should always call out to a horse rider, speak to them, theyre probably already aware their horse is tensed up abit but it gives them chance to hold the reins better, and then slow wide pass, and dont freewheel because the buzz of the hub, can really make the horse react.