What you are really saying is that we should held people accountable for their own choices and, as a society, attempt to help those who cannot make those choice

What you are really saying is that we should held people accountable for their own choices and, as a society, attempt to help those who cannot make those choices. I agree, to an extend, but the reality is that there are a series of factors, besides the moral or 'self-evident' reasons, that make companies/governments fund these projects. Moreover, forget about these factors for a second. The bottom line is that very few people would care if you found the cure for a very rare and destructive disease. Lots of people would pay a lot of money to avoid being fat. And by the way, why exactly do you think that those lifestyle choices are easy to change? Very few people want to have diabetes (I assume). So there must be something else besides pure will that we should take into account when thinking about this issue.