We know nothing about how the human brain works. True artificial intelligence/AGI (which is needed for level 5 self driving) is a pipe dream.
Sooner or later AGI will be available, it's just a matter of time. It does not have to work like a human brain
https://en.wikipedia.org/wiki/Outline_of_neuroscience
I didn't ask around, but I did watch quite a few science lectures/talks by reputable scientists about how the brain and our mind works.
I also did not make any claims other than suggesting that self driving AI will eventually be possible since there is no natural law that prevents it.
Being skeptical is okay, but you might need to back up your claims.
In finance they say past performance does not indicate future success, same should apply to AI in both directions. Just because its applications were too narrow in the past predicts nothing about the future.