Rights. What are they? If something is a right, then it MUST be provided. If we assert that healthcare is a right, then we MUST provide it -- by force if necessary.
What force would be necessary? Taxation would, of course, be the first force to be applied. But taxation is not sufficient. We'd also have to force providers. We could not allow providers to set their fees, schedules, or even their careers. We would HAVE to guarantee that there would be enough providers, of the right kinds, and in the right places, at all times. So we'd have to force the people with aptitude to become providers, and deprive them of any options. We'd have to make it illegal for those who are able to provide, to refuse to provide.
Some governments claim that they offer healthcare as a right. But they don't. What they offer instead is a queue to access a scarce resource. Worse, that queue is not served by the best -- because the best go where they can be paid what they are worth.