First: Why do you always need to assume web dev is stupid. Or less impactful. Imagine a bank website showing 10,000 <your currency> less in your account. I myself paid several customers a penalty/reimbursement, when because of our website, they suffered. And I am sure there are websites/apps which are more critical.

Second: You are assuming, they have done a half-assed job and hurrying to release. If you look at the earlier thread[1], several people have explained, how Tesla has 100s of millions of kms of their customers driving footage, using which they have trained the AI/ML algos. So I won't be surprised if these cars can do well enough in the dark.

Sebastian Thrun, one of the pioneers of self driving cars, recently has taken a turn to self driven cars just using cameras and AI. In his own words[2] he says, that we humans also just have our two eyes, so cameras should do the job well.

[1] https://news.ycombinator.com/item?id=12748863

[2] https://www.youtube.com/watch?v=kTfEFnYxej8 (Audio is bad for upto 20 minutes, then its Okay)

Edits: 100s of millions of kms of their customer

      can't --> can