[Sohcahtoa82]

Another commenter [0] highlighted the answer to this.

Crash testing isn't just crashing into barriers, it also tests automatic emergency braking. For crash testing, they could give a software build that's more sensitive to seeing pedestrians and bicycles, but not use that build in customer cars because it's prone to false positives.

[0] https://news.ycombinator.com/item?id=32837954