A hospital in the US can’t just let you die because you don’t have insurance. So when somebody is in a dire situation and isn’t insured their debt will usually be sold for pennies on the dollar to a debt collector, who will then make their life hell in ways that aren’t always legal, and the difference is just absorbed by the hospital who will then raise prices on others to compensate. Thus healthcare will cost more especially if more people are removed from having insurance or other coverage. I believe this is what the person you were responding to was trying to point out.