The law—which has now been upheld by the Supreme Court—says that you are legally obliged to purchase health insurance—just as we are all legally obligated to follow the traffic rules and regulations. And while you may vehemently disagree with the wisdom of Obamacare and those responsible for passing it, it is the law because, in the judgment of the majority of Congress and the President, it was in the public interest to make this the law. Welcome to America where law is made by a majority of Congress and the Presidential signature.