Actually, you are saying that PROFESSIONAL drivers have conversations and don't get into abnormal amounts of wrecks. Ok, I believe that. The bad part is that most drivers are amateurs.
I drive two hours a day on the interstate (not a "professional", just reasonably cautious with phone features built into car and never text and drive). You would be amazed at how many "professional" truck drivers I see crossing the line while fiddling with a phone. Whether they are texting or calling, I don't know. I don't see this daily, but I do see it about once a week. I85 in NC.