I have a dear friend who is a cradle Catholic. We have “discussed” similarities and differences for over 20 years. I think most who are RC are so by having been reared so. Some have very little knowledge of theology, but that is also true of Baptist. I was SB for my first 60 years. I am now PCA….which is reformed. I love apologetics, but many evangelicals don’t ……similar to the majority of RC believers. This may be some help in considering the question.
I am a ” Cradle Catholic ” and I found in the way I was reared as a child looking back on 60+ years a very protective and loving try by my parents who also came up though many years before me with a faith and trust in what they believed was the Only True Church. I loved it.
In my opinion the only good thing in the Catholic Church was the rare true priest who was acceptable to offer the true sacrifice. Well that was lost completely at Vatican II.
So there is no real reason to join up, but if someone was really searching as this original post is suggesting then I think they are really getting desperate.