I highly doubt that automakers have changed the logic of opening the drivers door with the car on and not warning the driver. So I suspect the case is just people being incredibly stupid.
It’s the same “logic” as the unintended acceleration “scandals” we’ve had that were later found to just be operator error, including having too many floor mats. Now we’re going to blame keyless entry for people dying of carbon monoxide poisoning? Wow.
And I’m not surprised that most being killed by stupid are old and driving a Toyota or Lexus.