Yes, that's true, from a reporting/statistical standpoint. I am okay with dismissing those two incidents when evaluating this record. There's a lot of leeway on human driver statistics. As I said above, I've seen 165,000 miles per accident and 250,000 per accident reported/estimated. I've also seen the claim that human drivers go 300,000 to 500,000 miles between accidents on average, but I heavily assume those are based on underreported figures.

My intention in comparing a traffic cone to a small child is the actual safety issue. If a SDC could hit a cone, it could also hit a small child. They're small road hazards which are not generally going to be mapped by the car in advance. I don't want to dismiss the fact that the SDC would've hit a road obstacle, just because in that case the obstacle was a cheap plastic object.