I think you’re still missing the concept completely here, because you’re thinking about it only in terms of rules, decisions, and authority. The real answers to your questions are:
- In cases where actual “decisions” and “mandatory laws” have to be made, the Vatican has decided that bishops should not be absolute dictators of their dioceses. Rather, the Vatican sees that some decisions are best made for the whole Church at the Roman level (e.g., the rules set our in Summorum Pontificum), and others are best made for regions at the national level (e.g., approving translations), because the Church and the members of the faithful benefit from uniformity. This way people can move around within their nation without being confronted with big changes all the time.
- Most things the conferences do are simply not questions of rules, decisions, and authority. The conference acts like a “league of bishops,” allowing them to combine their resources and, usually, get better results than if they were off trying to do everything themselves.
So in the first situation, about rules and mandatory laws, it bears asking – if the conferences were dissolved, would the Church be better off with those decisions being made either at the Roman or at the diocesan level? The first option is impossible, since the burden on Rome would be too great – there are what, 200 countries in the world? The second possibility might result in things like different translations being used in northern Illinois and southern Illinois. It wouldn’t be the end of the world, I suppose, but most people would probably agree with the current Vatican thinking that this would be a worse outcome than our present system.
And in the second situation, one must similarly ask: if we didn’t have the conferences, wouldn’t the bishops just create them on their own again anyway? They
want to work together, share their resources, and speak as a national authority. After all, long, long before the permanent national conferences existed in this country, our bishops were already getting together in things like the
Plenary Councils of Baltimore. These weren’t dogmatic councils or anything, but look at some of the kinds of resolutions they were approving:
“The Roman Ritual and the Baltimore ‘Ceremonial’ are to be followed. Pastors should keep registers of baptisms, confirmations, marriages, and funerals. All of these, except the last, should be written in Latin.”
Ah, a uniform rule to insure consistency from one place to the next. We’ve seen some of those in this discussion.
"
A commission is appointed to prepare a catechism for general use."
You’ve heard of the Baltimore Catechism, right? This is where it came from. It is simply a teaching tool, so any diocese that wants to can develop and issue its own catechism. Now, why did the bishops all come together and decide that it would be better to have a single catechism developed and approved at the national level?