That was not even remotely understanding of the Union when it was formed. Not even Madison or Hamilton claimed that a state would be unable to revoke its ratification without the consent of the other states. If any such doctrine had been put forward by the advocates of ratification, several states would not have ratified the Constitution.
If the framers had intended the federal government to have the right to use force to keep states from leaving, they surely would have included this right in the Constitution and would have specified this in the ratification debates. Instead, Madison said the federal government would not have the right to use force to compel the obedience of a state, as I've documented:
Proof that the Union Was Supposed to Be Voluntary
Two, if the framers had intended the U.S. to be an entity that you could never leave, they surely would have said so in the Constitution and would have made this clear in the ratification debates. Again, if they had said any such thing in the ratification debates, a number of states would not have ratified the Constitution.
Moreover, several states stipulated in their ratification ordinances or state constitutions that they retained the right to resume full sovereignty, precisely because they were not sure how the new federal union would pan out, and not one of the founding fathers objected to that stipulation.
Finally, it is a demonstrable fact that
the framers believed the Colonies had a natural right to secede from England, even though there were no provisions in British law for a colony to leave the empire. So to argue against the right of secession is to argue that the founders gave the federal government a right that they bitterly condemned the British government for claiming to have.