I don’t believe police are better at using phones while driving than anyone else. I think you can train to improve your driving skills while you’re fully concentrating on the driving task, but I highly doubt that you can effectively train someone to be as good a driver while using a phone.
Having the police regularly using their phones while driving doesn’t sit right with me. In that recent case on the Central Coast, the police van had two police officers in it. Why couldn’t the other officer have fielded the call, or at the very least held the phone or put it on speaker? I have seen photos and videos where the police are obviously using phones for frivolous purposes (e.g. taking photos/video while behind the wheel). I think the exemption is OK for emergencies, but the police should be using them extremely sparingly.
Just because they’re exempt from the law doesn’t mean they shouldn’t refrain from using them.