This is a case of a family who chose to live on unincorporated land because they wanted less government protection. It's a severe edge case involving very individual circumstances. You can't make any conclusions about the US from this.

I wasn't able to find it again but there also people in Germany who lack health insurance due to an inability to pay and must rely on charity clinics. These are mostly elderly Germans who paid into a private system, foregoing the public system, and eventually lost health insurance after their earnings declined. It's just the US that has these "third world problems."