Change the names in the article from church of Rome to LDS church, and both make the same argument.
But then you have the issue of Rome saying their Big Daddy is the last word, and the LDS prophet having the last word, and the two of them disagreeing.
Then you have the guy who’s the last word on stuff changing what previous dead last word guys said about stuff.
If you visit the Vatican website where the actual texts of the encyclicals are available, you'll find that one builds upon the previous, and affirms the Church's teaching.
God bless you!