I honestly just wish they'd settle for a simple, concrete description of what's acceptable while driving and what isn't. Like, you must always keep your eyes on the road, or you must always have both hands on the wheel, or whatever. Of course, this would have collateral damage - reaching over to change the radio station becomes illegal. But that's a distraction too, isn't it?
I think about this occasionally since I use my phone to play music in the car. When I reach over to tap 'next track' on the incredibly broken Bluetooth hands-free kit (that CA law requires me to have) to change tracks, I'm technically distracted. Is it any different from reaching over and tapping the next track button on my phone? If anything, it's more distracting because Bluetooth (at least for cars) is a complete nonfunctional clusterfuck of a spec that never, ever works right and when it breaks in new and exciting ways I end up more distracted than I would have been if I just tapped a button on my phone's screen.