9/10 when I argue with a ardent Catholic it turns into one more more of the following

>In not a priest so I can't interpret scripture
>The Pope says
>The catechism says
>Tradition has it

The most concerning one being not being able to interpret. Like, man if you are indwelt with the Holy Spirit....why would you not be able to discern scripture. Obviously different measures of understanding to different people are given, but still. To just pass it off as "I can't"? Nah man, that's how you got it into being the Beast of revelation that it was. Teaching in Latin which very very few knew and keeping the scripture for their eyes only. Popes claiming to be God, to sacrifice Jesus at every Eucharist, etc.

It became a monopoly, and a monopolies are almost never good.