>People are going to be on their phone at 70 MPH no matter what do-dads are in their car

Somewhat disagree. It's not a distraction panacea (based on various studies) but if we had voice recognition and natural language processing in cars that really worked well, there would be a whole lot less temptation to look down at a screen or type.

Not justifying people who do so. Just observing that better tech would largely eliminate any reason to do so.