What about emergency responders?
"Sorry, we would've been there sooner, but we couldn't get out of first gear because we had to pull over every 15 seconds to answer the dispatcher..."
Or maybe police, ambulance, fire, etc. can drive (speed), listen, calculate, respond...you know, multi-task--'cause they're professionals....
Should truck drivers be banned from using CB radios while driving too?
Just a thought. I try not to talk on the phone while driving, but then I really don't like chatting on the phone.