Why are you asking Protestants a question about Catholicism?
Because a lot of them know more about it that most Catholics?
"One indeed is the universal Church of the faithful, outside which no one at all is saved, in which the priest himself is the sacrifice, Jesus Christ, whose body and blood are truly contained in the sacrament of the altar under the species of bread and wine; the bread (changed) into His body by the divine power of transubstantiation, and the wine into the blood, so that to accomplish the mystery of unity we ourselves receive from His (nature) what He Himself received from ours." — Pope Innocent III and Lateran Council IV (A.D. 1215)
Therefore, if anyone says that it is not by the institution of Christ the lord himself (that is to say, by divine law) that blessed Peter should have perpetual successors in the primacy over the whole Church; or that the Roman Pontiff is not the successor of blessed Peter in this primacy: let him be anathema. — Vatican 1, Ses. 4, Cp. 1
Because its rhetorical, besides being valid. RCs have often show they cannot or will not objectively deal with the aberrations of Rome, while you seem to be part of a group or movement which judges what RC teaching is based upon your interpretation of historical documents, contra following your pastors and V2 in all it says.
Probably because they know more than most Catholics.