No, it is most certainly not that simple. I love how you think that claiming something and adding "It's that simple" somehow makes your assertion true and proven.
cuм ex actually stated the exact opposite of what you're saying.
The problem with cuм ex is, if everything it says pertaining to lost offices is in fact still in force or is divine law as the sedes believe, then there has been no Catholic Church on earth for the last 60 years for certain, more likely the last 400 or 500 years - at least.
cuм ex:
Anysoever who, before this date [or shall in the future], have been detected to have deviated from the Catholic Faith.....
If cuм ex is in fact the law, then it absolutely applies to +ABL who signed the docuмents and said the NOM, to "The Nine" who all studied NO theology at NO universities, to +Thuc and all V2 attendees, to everyone who has ever spoken with a NO priest or went to a NOM. They all lost their offices. This doesn't even begin to scratch the surface.
Where does it end? Where does it start? According to cuм ex, it can be argued that St. Paul was an invalid Apostle since "before this date", he not only deviated from the Catholic faith, he persecuted those who held it.