Your points about DAYTIME use of a strobe are good, and I should've focused my comments on nighttime use of strobes. At night, as you agree, they're dangerous. But I'd suggest it could just as easily be that oncomming drivers see a blinking white light comming toward them and associate it with an emergency situation, the only other and by far more common situation where a strobing white light is used on the road, and yield extra time accordingly. Getting cut off by left turners involves situational blindness, distraction, bad judgement of bike speed and time of convergence by the driver, their state of rush and consideration for cyclists in general. Not just their physical ability to "see" the rider, despite what they say after causing a collision.