For constructive ends.
In fact, the Pope needs criticism of his mistakes far more than ordinary laypeople. If I make a mistake, it is not so bad, but if the Pope does....
Hmmm...I guess it all depends on how one defines “mistakes”.
Lest one be guilty of playing the the Pharisee (”...did you see that Jesus character - healing people on the sabbath?! WHO does he think he is??”. Or more recently: “Get those b@stard children outta here - what were their mothers thinking? bringing them to be baptized - sheesh...”)
But what do I know - I’m of the protesters...