Yes, but crucially, they choose to eat too much. They could stop. Those who starve never do so of their own will, and would absolutely take the alternative if

Yes, but crucially, they choose to eat too much. They could stop. Those who starve never do so of their own will, and would absolutely take the alternative if it was available to them. As for the healthcare costs, I expect we will see something very similar to what happened with tobacco. A combination of economic disincentives and regulatory measures (no sugary drinks and snacks in schools, smaller portions etc), which will ultimately curb the problem.