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I agree. Left turns on green are an invention that works great in rural American small towns where traffic volume is low. Most of the places I've lived transition to protected signals as the density of the area goes up, but sometimes it can take years for the funds to be allocated, and in that time it can become a pretty confusing intersection. In a proper city I think they make no sense at all.

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Disagree. Left turns on green are a compromise that prevents people from going through the green 50yd past the intersection and banging a u-turn, which is exactly what they'll start doing if you don't let them turn left at the intersection but do let them legally turn left into businesses and whatnot across the street.

Divided roads mostly don't need left on green since they mostly have dedicated turn lanes.

Not everyone would call Los Angeles a proper city, but it's dense and there are very few protected left turns. As thrilling as passing against oncoming traffic on a two lane road.

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