Are you suggesting that by wearing hi vis you are safer?
You seem to be conflating hi-viz with reflective. Hi-viz is useless at night, and can be missed if the lighting is poor, foggy, or against you, whereas reflective is immensely useful once it gets into twilight conditions.
It’s not unusual to come across people walking or running along unlit lanes around where I live, and any bits of reflective show up in your headlights a good distance away, especially if it’s low down on socks and shoes, or elastic bands around trouser bottoms, but reflective material anywhere is a massive improvement over bugger-all.
This fact shouldn’t need pointing out, it’s so obvious.