You might have iron concentration, others do not. You might be a super stunt rally driver, others are not. It really doesn't matter how good a driver you are, there's invariably somebody out there who's worse; somebody who can't walk and chew gum. That's who these laws
Do you really want your doddery old neighbours taking their eyes off the road or using what few brain cycles they have remaining to think about a phone conversation? I wonder if your answer would change after they mow you and your kids over.
And say you and your doddery neighbour are both on the road in the same place and are both on the phone. Are you still focussed enough on the road to avoid an accident? Are you really that good? What if the office has just rung you up and they're asking you a difficult question? There's a swerve up ahead. Still focussing on the road?
I don't understand why people are trying to apply "I'm the best driver, so this shouldn't apply to me" logic to this. Driving is a fucking miracle. We hurtle around the world in these massive wheeled machines that we control with mere twitches. One wrong twitch and we're dead. One wrong twitch and we can very easily kill many other people. How much concentration are you really going to split out so you can have a conversation?
I can't believe common sense is going to take a back seat to shitbag studies like this based on data like free minutes, when every other study worth reading (including those based on actual call data, eye tracking, brain activity metering and hazard avoidance) points that having a conversation (even one handsfree) is making you a significantly poorer driver. You might not cause a crash but you might not be able to avoid a collision that you would have otherwise.
And what about people sitting in the car? Yeah, they're a distraction too but they're also another pair of eyes. If you've got kids flipping out in the back, get off the road and sort it out. It's not as easy to legislate against these but if you have an accident and it can be proven that you were driving an unsafe vehicle, they should throw the book at you. As a driver, your car is your responsibility. If you can't swallow that, get off the road. Some of us are trying to drive safely.