The Federal government did not take over the States. The States joined together voluntarily when we were a lot weaker compared to the rest of the world.
We came together as a free society. That means we can dissolve it voluntarily. Just letting us talk about seccession can force real change. Nobody wants to secede unless there is just no hope for reform. If it's treason to discuss our last resort, then the power really has shifted away from the people to a centralized elite.