Because the framework supposes that the claims of each religion are basically the same, and Roman Catholicism explicitly rejects this.

Yes, that they reject the framework doesn't really matter does it?

Of course it does, it makes it incompatible. If one claim explicitly rejects another claim, then the two claims aren't compatible.

The claims inside the framework don't need to be compatible, they're just religions.

So none of the exclusive claims of any religion to have the full truth are true, but your personal opinion about all of them is fully true? Your arrogance is unbearable.

Um no. I am saying one of those claims might be true. I'm trying to make a logical argument about their commonality, not give a personal opinion.