As a type 1 diabetic myself, my thoughts have changed about health care because it is a collective societal problem. For example, I could be cured of the disease by now if the collective public health policy of the nation decided to fund a successful cure rather than to let it linger as a profitable, chronic, manageable condition for a number of pharma companies. So the health implications of why I have type 1 diabetes or not are more than just my genetic background or my personal behavior -- it's also the result of social policy and decision-making.
To make individual people responsible for that social policy and decision-making is absurd.
Like it or not, despite the people who eat themselves to death by chowing down on potato chips and pizza until they are morbidly obese, our collective social policy plays a role (not the lone role, but a significant role) in that responsibility for how they got there and the resources and facilities for keeping them healthy and a non-burden to society. To think otherwise would be to think that community garbage collection and disease prevention is somehow solely a personal responsibility.
Say all you want about individual freedoms and the responsibility of personal choice, but health care is not solely a personal choice by a longshot. It is the product of a collective society, with implications that individual approaches fail to address properly.
It sucks for a lot of people, but you can't bury your head in the sand and act like you have eminent domain over your patch of the world and everyone else who happened to be born around you are merely interlopers. Nobody chooses to be part of a broader society -- it's something we inherit from our birth. But that doesn't mean we can simply choose as individuals to no longer be a part of it.