That's a product decision, though. They want people to feel safe, and to build a sustained record for being safe. They could easily hit the pedal if they wanted to.
"Lawful to a fault teenager" is not what people want in a taxi driver. That type of chauffeur doesn't make people feel safe. It makes them on edge. But unfortunately that's the kind of AI chauffeur regulators want.
I agree it's the "right" way to do it from a PR perspective though.
They are doing the right thing.