Every decision is a comparison of alternatives. If you control how people see the alternatives, you can sell anything. Trump did a great job of eroding the credibility of Obamacare, but the first GOP plan for its replacement failed on the contrast level because experts said fewer people would be covered. The best persuasion play for health care would be to create a bill that covers more people, one way or another.
Create contrasts, even misleading contrasts to make your alternative seem far superior. The larger the contrast, the better the persuasion