At some point, there is a responsibility to yourself and your children.
The American Philosopher

Your example of a pot-smoking, fried-chicken-eating person doesn’t answer my central argument that healthcare is a right. Responsibility, your other tangential point, isn’t a part of the equation for the chronically ill. And your argument doesn’t follow from the personal anecdote I used to illustrate my point. You seem to be arguing a form of Randian Objectivism, or self-interest. If so, you may want to reread Ayn Rand to see how she develops her philosophy with detailed examples.

However, since you are bringing in responsibility, I’ll bring in its twin virtue: justice. A just society grants healthcare as a right to its citizens because it enables them to participate in our economy, our society, and our political system.

If I’m understanding your argument correctly, “we” (and I’m assuming you mean society as a whole) shouldn’t pay for “my” (and I assume you don’t mean me personally, but rather a representative individual) “bad decisions.” You don’t explain what decisions you’re talking about beyond smoking pot, eating fried chicken, and “deciding to work part time with children as a single parent.” But to follow your logic, any condition that warrants healthcare should be paid for by the individual and not “the government” (again, I’m assuming you mean federal government).

In your reasoning, all costs should be borne by the individual regardless of genetics, accidents, poisonings. What happens to those who cannot pay because their work or their disability or their age bars them from a healthcare benefit? I suppose we let them die?