Doctrines do have an independent existence, as was demonstrated by the authority of those apostles attending the Council of Jerusalem. Their authoritative decisions regarding dietary matters and circumcision were settled as independent matters that no longer needed to be subject to personal interpretation or preference.
Now I appreciate that you read the CCC a lot and that shows you want to understand, even if your only reason for wanting to understand is to turn Catholics in this forum into heretics according to the CCC.
But you see, we are open and unafraid through the CCC to declare what we are obliged to believe in if we want to call ourselves authentically Catholic. Now, if I wanted to test your convictions of your own faith as a Baptist, what book would I go to that covers the kind of matters and gives the kind of guidance that the CCC gives to Catholics? For example, if I wanted to check whether your views are consistent with the views of the Baptist Church regarding homosexuality or same-sex marriage or abortion on demand or euthanasia, and all the other matters that Protestants have to think about since they are confronted by the same decision making that Catholics have to do, what authoritative source do you have to work from **that I can access **that is comparable to the CCC?