So, I believe, is my bikeI believe they are all equipped with these hi viz things called 'lights'
Cars and motorbikes don't have reflective elements? Reflective strips only work when they have a light shining on them to reflect. Great at night, no use at all in the dull light of winter evenings or when cycling into a low sun. Why wear black?
"It looks good, it goes with everything, and it doesn't show up every speck of grime".
So it is about vanity
I cycle every day. I'm not sure that not wishing to look a complete tit all the time by getting dressed up as a space lemon™ equates to extraordinary vanity.