Lights

I take what you say onboard, but I think its safe to say that most of my cycling is done in the dark, and it does make A LOT of difference when my lights are on their maximum power. I'm not imagining it. It does make me safer, and causes drivers to give me metres of room, instead of inches.

Heavily laden lorries passing inches from me at 50mph is no fun. Its scary. Really scary.

I'm not disputing the fear factor, but there are times when those lorries are going extra wide around you because they've been blinded, and might compromise the safety of oncoming traffic - driving too wide whilst their eyes are readjusting - and that could end in disaster for everyone in the vicinity.

Drivers also make bad decisions when they're finding something exasperating about being behind a cyclist. Some drivers are just like this about bikes in general, but plenty get like it due to reduced visibility (from LED glare), poor rider positioning, erratic riding, etc.