I was baptised Catholic, conmfirmed Lutheran. My whole family is Catholic, 12 aunts & uncles, over 40 cousins. Not once had I ever heard of them, or any Catholics, gathering together for ongoing Bible study in private homes, as Protestants do. Most, if not all, Protestant churches offer some sort of “extracirricular” Bible study. I’ve called Catholic church rectories inquiring about Bible study for their congregations. Icks-Nay. I was informed the Bible needs to be interpreted thru “hierarchy.”
As for the involvement of the hierarchy, when one looks at the differences between Episcopalians -- among whose articles of religion are statements about sola scriptura etc, Amish, Jehovah's Witnesses, Lutherans -- of their increasingly different sub-divisions, Calvinists of various kinds, Methodists, and so forth, the history of Sola Scriptura and unity od doctrine or practice is depressing.
Mind you, some of the hierarchy give me the heebie-jeebies too.