Basically, it’s the same thing — you’re too damned fast and you either biff a turn or can’t react in time when some idiot cuts you off. As for the left hand turn “didn’t see you” crap — they see you, they misjudge the speed or they figure you’ll stop for them. I tested this: it’s amazing how if you lay hand to pistol (don’t draw — that’s “brandishing”) those car noses drop hard. They see you. They figure you aren’t a danger.