Why might the Framers have wanted to reserve specific powers for the States?

To avoid many of the problems we have now. The State's unable to make their own choices as dictated by it's own residents. The Federal government now wants to tell use what to eat, what health care we MUST have, they are infringing on our personal freedoms.

The Bill of Rights, Amendment X states:

"The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people."