There are many reasons I am not a Roman Catholic, but one certainly is the pervasive, historic, and systemic secrecy. Many examples could be offered. For example, the secrecy of the curia coupled with the condescending clericalism I’ve seen firsthand from priests in spite of what Vatican II says about learning from the laity are just a few.
It stretches credulity to think the Roman Catholic church can properly handle the ongoing (that word is key) sex abuse given the Roman Catholic’s long and problematic history.
And for the record, I taught in Poland and know many dynamic Christians who are in the Roman Catholic church. I just think the overall system is badly broken and lacks the proper theology in doctrine, leadership, and praxis to make things right.
There are similar, but not identical reasons that I’m not Baptist. Though I am sympathetic to Baptist theology, and though the Southern Baptist Convention is not as secretive as the curia, there is much that still gives me concern.