Sure. What we know, though, is "stop doing that" doesn't work. That's why aviation, highway safety, healthcare, tech postmortems, etc. have discovered that "please ask the human to stop doing human things" isn't the approach to take. Instead, we try to engineer away the opportunities for human error to kill people. (Quite successfully, in a lot of cases; as an example, aviation safety in the developed world is overall an incredible success story for regulators.)

People will continue to use their phones in their cars. That's a fact we have to accept.