The notion is very odd that one part of the body - say a toe - voluntarily separates itself from the rest of the body and then claims that it IS the body and that the rest of the body isn’t. Either that or the toe claims that it is the true body and the rest of the body has lost its way.
Reformation 101.
But we aren’t separated, Mark. As the universal Body of Christ, each one of us is joined to the rest of the Body. Just not to the Roman Catholic Church.