So, one of a few things will happen. You may forego treatment and recover, in which case great. You may forego treatment and remain ill, meaning we all lose out due to the loss of a productive member of society. (Or, worse, you hurt a bunch of people.) You may seek treatment and be able to afford it, in which case great. Or you may seek treatment and be unable to afford it, meaning the rest of us get to pay for it for you.

That last one in particular is why we like to force people to have insurance. It's basically the same as forcing you to have liability insurance for your car. You can end up costing others a bunch of money, so we want to make sure you're able to pay it back.

Decisions have consequences. So long as the consequences remain confined to the person making the decision, I don't care much. But once they start impacting others, there's trouble.