I have some sympathy for what you're saying. This is certainly true among established believers, including the first Reformers. But of course the same can be said for almost all people raised in the RCC. I was thinking of those who really did initially read (at least parts) of the Bible on their own. I was like that. At the time I knew absolutely nothing of the differences between Catholicism and Protestantism.
Of course I am an insignificant anecdote, however, there is a much larger comparison for today. That is the Gideons. A Gideon comes and speaks at our church a couple of times per year. We donate to them. Their ministry defines people reading the Bible from nothing, and there is obviously no theological follow up in a great majority of cases, if ever. Does the RCC support the Gideons, or even approve of what they do?
Not the same, because we are taught not to bring our baggage into the scripture. We are told to check with what the Catholic Chruch as a whole teaches.
the RCC support the Gideons
I don't know for a fact either way. I would not be surprised if we do, as it is sometime a useful thing, but I also would not be surprised if we don't because it is a truncated Bible.