the reason nobody owned a bible though was because of the fact that until the 1400s bibles were hand printed and even than the early printing press was slow family bibles and such did not become common until the 1800s
I had a friend who was a Portuguese RCC! All kinds of nuns and priests n her extended family. She told me it has only been recently they were allowed to read the Bible. Like 30 years ago. So this statement of yours is also untrue! Lots of Bibles around in the 16 to 20th centuries.
The reason these monolithic cults don't want their members to read the Bible is because then the would see what these so-called churches were teaching were in contradiction to the Bible.
My grandparents were Eastern Orthodox, and my grandmother started reading the Bible, along with her friends. They started going to Sunday evening evangelical services. The next thing you know, she was telling family and friends that they needed to believe in Jesus! Not the church for salvation! And Catholic family members who read the Bible have left the RCC. Because, as my cousin says, "If Jesus is real, then you have to follow him, and not the doctrines of a church, where error has compounded century after century!" That being the RCC church, of course.
PS I parted ways with my Catholic friend when she started sleeping with different men every night, but told me it was ok, because she could go to confession and be absolved of her sin! Like it was a lark!