Sede-this, sede-that?
I have only ever known sede to mean sedevecantism.
All these sede-isms make my head spin...
Why can't we just be Catholic?
Because unless there are various, erroneous groups, professing their own unique [dogmatic?] beliefs while all claiming to profess the same Catholic truths, except of course for their own unique beliefs, there would be no division. The truth is that sedewhateverism causes division among the faithful.
This has always been the most successful of tactics that comes from the devil, he does it to promote iniquity among the faithful, this tactic is commonly known as "Divide and Conquer".
That's why, even amongst ourselves, we can't just be Catholic.