You've made several erroneous claims, so I'll comment on a few of them:
Hospitals are not required to treat, but most do. It is general knowledge in the industry that if you can't afford treatment for your cancer you go to a local hospital where you will be treated regardless of ability to pay.
Yes the US spends more than any other industrialized nation, but no, health outcomes are not the worst. If you use blunt tools like life expectancy to measure outcomes, the US ranks far behind, but that is only because of other extraneous factors that have nothing to do with quality of care. Check out cancer patient outcomes for colorectal cancer sometime, the US outcomes easily outstrip those of other countries.
Medicaid is not only for the extremely poor. The ACA just bumped up Medicaid income eligibility to 133% of poverty level. That's over $30K for a family, so I wouldn't say that's "extremely poor".
I have no idea where the "Medicare kicks in for the old because it is unprofitable" comes from. It was a social benefit put into place in the 1950's. The insurance industry has nothing to do with it.
No you can't lose your home over medical bills. Your primary residence is protected when you go bankrupt. Also, even in nations with single payer systems patients end up financial difficulties when sick because they can't work.
I suggest you do some more research and educate yourself on these issues rather than repeating what others tell you.