I think it's mostly because the eye is drawn to motion/change, which hijacks your attention. When the turning light is blinking on-off, it only distracts you for a fraction of a second each time it blinks, while…
I think it's mostly because the eye is drawn to motion/change, which hijacks your attention. When the turning light is blinking on-off, it only distracts you for a fraction of a second each time it blinks, while…