Do you suppose the many "Romanists" who have sacrificed their (human) existence, (Jeanne d'Arc, the apostles Paul and Peter, for examples), were not exercising personal responsibility?
I'll refer you to a book, you may or may not read it, yet if you do then you would better understand the Roman-Catholic Church as well as the Church's, thus God's, position on other denominations.
Catholic Matters by Richard John Neuhaus
You might be surprised at many of the insightful revelations put forth from the erstwhile Lutheran.
I’m well aware of the Romanists ubiquitous ownership claims.
I’ll give you Jeanne.
Thanks for the suggestion.
I just wish there were more Lord Acton followers.