Actually selling cars to the public is an exceptionally poor excuse for -- as it has been described upthread -- using technology that is known to be inadequate to safe implementation of the feature set.
If a feature cannot be safely implemented at a price point suitable for the target market of the vehicle, then it shouldn't be in the vehicle. Deliberately choosing otherwise goes beyond mere negligence into actual recklessness, IMO. (Note, I'm not saying that Tesla is doing this, I'm saying that the use of the excuse "they're actually selling cars" as a response to the claim of proven inadequacy of the sensor choice made upthread is an inadequate excuse, since if that was the reason and if the sensor choice was proven to be as inadequate as described, then that would be reckless.)