According to the link below there are 529 accidents per 100 million miles driven for people aged 20-29. That is a bit better than 99.999% reliable.

Self driving needs to get down to 1 intervention in 200k miles to match the average 20 year old. They have a long way to go.

https://www.friedmansimon.com/faqs/how-common-are-car-accide...