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.