You are conflating healthcare with the financing of healthcare (especially through insurance). (This is a common error, and many government officials do so--whether by design or confusion, I can't say).

Here's a simple example of the difference: Most insurance policies pay for opioids to alleviate pain. Now these medicines aren't free--you have to pay for your insurance (including Medicare), but let's say that the American health insurance system makes opioids affordable for anyone that it covers. However, in most (maybe all) cases, opioids are worse for your health than the problems they claim to alleviate. On the other hand, natural alternatives (which in certain cases may be more effective and less harmful than prescription medicine--as shown in peer-reviewed scientific studies--I'm not talking Dr. Oz or ivermectin here) are not usually covered by insurance policies. In fact there are a number of unhealthy problems (side effects, the prescription cascade, drug interaction, unnecessary surgery....) that conventional medical insurance not only ignores but finances. The first question to ask about a particular healthcare system is not "Is it affordable?" but "Is it harmful?" ("First, do no harm"). Once a rational healthcare system has been implemented or at least designed, we can go about making it affordable for all.