The difference in intent makes sense. The difference in primary function does not, killing a person with a kitchen knife is no better than with a gun.
The problem with car accidents is that it’s difficult to know the intent of a person, especially carelessness kills a lot more people via cars than via kitchen knifes, and we can’t know for sure when it was an honest mistake by the driver.
Most people don't really care about cool tech, they want a phone that just works