Frankly most of it is nonsense. It's hard to present any argument that would allow any use of a phone when driving if such use involved looking at or handling the phone but there are many much more dangerous distractions than talking hands free that no-one would consider making illegal. Like child or in some cases adult passengers. Laws against loud music are unenforceable except at low speed in an urban environment. I know many drivers who I would trust to do any of the above whilst remaining safe. And I know many others who are unsafe simply driving with no distractions.