Let me give you a real life example.
I was born and raised Jehovahs witness. I am used to having a school for ministry, and a publication that the whole church would study. Also preaching publicly. We would also break up in small groups and study a book in private homes.
The study schedual and evangelical training was great.
Later I learned of the Catholic church, it was great to learn the truth. It is great to learn about mass.
But I have no catholic family, and no friends in my parish…that isolation was very very bad, going to mass on sunday was and is not enugh to sustain me spiritualy.
However if I go back to my protestant roots, and baptise Jehovahs witness practices that don’t conflict with the church.
I then can be a good Christian.
I strongly feel that protestants canot leave there church and be a good Catholic, if they leave behind
the things that they did as protestants that made them feel Gods presence in there life.
So I may not be a Jehovahs witness under the direction of watchtower, but I am one of Jesus witnesses under the athority of the Pope.
Now some have Catholic family, or a Catholic spouse to assist them. for them things are different. But not for me. I have no choice but to learn from my protestant roots. Cradel Catholics probably have no need for this.