Do we really need another law to regulate our freedom? I almost always wear mine, but occasionally jump on the bike just to ride a few houses down to the neighbors, and do indeed feel a bit more vulnerable, and am taking more of a chance - I know that. But I don't need to be braking the law.
Absolutely. And health care providers should be free to refuse you services if you sustain a head injury while riding a bike without a helmet. And health insurers should be free to cancel your coverage if you choose to ride a bicycle without a helmet.
Let freedom ring, but let it ring far and wide from the mountains, from the valleys, from the fruited plains, etc.
And I guess your health care providers should be free to refuse you service if you are overweight because you eat too much or don't exercise - probably way worse overall than not wearing a bike helmet. By all means, lets have a bunch of petty bureaucrats sit down and legislate all areas of our lives.