Well, half of the time they are switched on they are "off". They grab your attention sure, by distracting you.
I like my presence to be constant. :/
wut? I drive, walk and cycle. When I started to drive again about 18moths ago it really opened my eyes to how hard it is to see cyclist on a dark, rainy evening. Solid lights get lost in the rain and you can't look everywhere at once. Your eye really registers a flashing light in your peripheral vision much better than a solid light, therefore you are alerted to something in your vicinity without having to move your eyes to another position and letting them adjust. It's this kind of thing that reduces the risk of accidents.
tl;dr. It doesn't distract you, it alerts you to something you need to be aware of as a driver.
It annoys you as a ped? So what, it's good for cyclists and drivers.
wut? I drive, walk and cycle. When I started to drive again about 18moths ago it really opened my eyes to how hard it is to see cyclist on a dark, rainy evening. Solid lights get lost in the rain and you can't look everywhere at once. Your eye really registers a flashing light in your peripheral vision much better than a solid light, therefore you are alerted to something in your vicinity without having to move your eyes to another position and letting them adjust. It's this kind of thing that reduces the risk of accidents.
tl;dr. It doesn't distract you, it alerts you to something you need to be aware of as a driver.
It annoys you as a ped? So what, it's good for cyclists and drivers.