I like your option 3, Stoutgig, though the “brainwashing” issue was dealt with some time back and dropped even by the OP. And the issue still isn’t the verity of our Church. It is about the process of acquisition of belief, which appears to be identical regardless of culture, time, place, or of the beliefs involved. We could be talking about How I Came To Eat What I Eat, but this is a forum on philosophy, primarily Catholic.
Once we are aware of and understand the process of acquisition of beliefs, then we might more usefully and competently treat of which belief is superior to, inclusive of, not relevant to, etc, someone else’s. Right now this is a question about an observed phenomenon made public note of by a poster, albeit with the appearance of an emotional slant in its original but since changed form. So far no one has made any contributing observations of significance relative to that observation, other than that some agree it happens.
There are books written about this subject, and pertinent ideas and principles, but none of those have been noted here. If I was the OP and got the barrage sent her way on here, I’d wonder what the heck are people thinking? This isn’t about being Catholic or not. And if you exclude the process of examining other religions, Stoutgig, you exclude it for non-Catholics as well. We Catholics are only about 1/4 of the world’s population, and not all strling examples, either, you might agree, even excluding recent bad press. So what do you propose for the other 3/4 if they are not to look? And then, there are, of course, all those 400+ exoplanets just in our galaxy and even unto the universe beyond the 13 billion light year radius we now see to. How many souls are out there that might not think or believe as we do, and yet perhaps acquire their beliefs in a way similar to our process? It is a fascinating thought experiment, eh? What is the spiritual significance of how a mind acquires a belief, and how can that belief be altered to favor the propensities of Soul?