If you look at the imgur link you'll see a impact barrier that had previously been crushed and not reset or repaired.
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I dont see it
It's in the techcrunch image, not the imgur. The barrier with the yellow face is designed to collapse.
https://techcrunch.com/wp-content/uploads/2018/03/screen-sho...
That still looks pretty risky to me - I compared a similar junction here in the UK near to where I live (on the M90 in Fife) and it has about 40 impact attenuation barrels in a triangle.
Those are also present in many locations in the US, although they seem to be phasing them out so I think they are considered old tech. I don't know the performance specs, but new cars are a lot smaller and safer than old cars - the same is probably true here too.
that image also makes me wonder if tesla's system is designed to identify knocked-over cones. It's one of those things that would be easy to code for, but also easy to overlook.
It's quite hard if you take into account that machine learning needs 10000x the training data that a human needs, and Tesla is sold in 30+ countries (and used in much more).
I think 3d mapping the surrounding world correctly using multiple cameras (what humans are doing) is more generalizable.