Nothing weird about that, it's the essence of federalism. The resilience of the American system of government is attributable in large part to federalism, the marketplace of ideas from the states competing with each other.

There is no patent on insulin, just regulatory capture on which proprietary analogs are approved for medical use. In 2020 the FDA changed the regulatory status of insulin, signaling that it's not going to let that regulatory capture continue. But if it does, there will be a lawsuit, it will go to the Supreme Court, and the pharma companies' arguments will probably get thrown out.