There are certain things the states do not have the power to do. Search you without probable cause is one of those things. And there are certain reasons they do not have the power to do those things. A lot of thought went into that.

If you think about drugs, they are just compounds people choose to consume. Why should we give power to regulate that to the states? Why do states not have the power to ban firearms?

Individual liberty is above states rights. Everything isn't "states rights". Some things are just nobody's business but mine.