I'm starting to get concerned about you, you seem to have suddenly leapt towards a belief that the government needs to control every aspect of people's lives, and that all government interference is beneficial no matter how over-zealous and draconian it is. You seem to be taking the irrational 'preventing one incident is worth punishing millions' insanity that pervades authoritarian governments worldwide, while ignoring the fact that it won't actually address the problem issues.
What changed Nitefly?
Well, I appreciate your concern

I don't think that the Government needs to control every aspect of our lives. From the article, there is however a problem in that 5,200 people are year are hospitalised from dog attacks. That is not insignificant. Will an insurance policy stop those attacks? No. It will however promote the second best alternative of compensating those who fall victim to the attacks.
It really isn't so dissimilar to car insurance, and I would be very surprised if the same level of mandatory insurance would apply to every breed of dog in the same way that we pay different insurance on different cars at different ages.
If we wanted to achieve the first best alternative, we can either ban dog or dangerous dogs completely, or ensure compulsory training for all dogs. I think you will agree that the former is disproportional to the problem and the latter more burdensome than the proposed solution. Accordingly, providing the insurance fees are not excessive, then I see not problem with the policy.