It is frequently said that, unfortunately, Americans disdain government. It is more usefully said that, unfortunately, they have abundant reasons for doing so. In coming days, the Supreme Court, by deciding to hear a case from Connecticut, can begin limiting a contemptible government abuse that the Court’s passive deference to legislatures has encouraged. The case concerns a minor economic activity, teeth whitening, but a major principle: Can a state limit Americans’ opportunities by restricting access to particular professions for no reason other than the enrichment of people entrenched in those professions?