The scariest thing is that it's so fucking familiar, this idea of technologists solving a range of simple cases and assuming the solution extrapolates to success in the real world. We cannot get into these cars if that kind of software development feels anything like everyday software development, where random web site bugs can be tolerated.
As a preliminary step to any regulatory approval Tesla should release every byte of data from their tests so we can analyze the scenarios and events that the software has dealt with, so we can second-guess them. I seem to remember a common criticism of Tesla is that it's kinda shitty to work there and I don't think the best work comes out of an environment like that.
We should know for sure what they/you mean by "seem to" and "very low." Trade secret protection is insignificant when public safety is involved.
"They had to not react quickly because they keep mis-detecting things" is really not an acceptable justification. If that's the why (and it probably is) that car should never have been on the street.