Healthcare isn't a hard issue because the details are hard to figure out. Healthcare is a hard issue because millions of Americans work for companies and industries that are dependent on the status quo. One of the primary reasons for skyrocketing healthcare costs is the explosion of administration staff/costs in healthcare systems. And the private insurance industry has given rise to some of the largest companies on the planet.

Its difficult because the system has evolved to a place where the parasites in the relationship have grown so large that they can't be removed without serious damage to the host. Not overhauling the system is unsustainable, but doing so will absolutely incur huge economic consequences for a large part of the population.