I don't disagree with the Idea that the Apostles gave leaders of local communities the authority to decide on important matters within the Christian community. Saint Clement of Rome mentions as much in his Epistle to the Corinthians, that an Apostolic order was set by them for the good of the Church and that the Corinthians were undermining the Apostolic appointments by getting rid of their presbyters.
This is a good example of what happened in the apostasy. The Corinthian saints threw out their apostle ordained bishops and replaced them with their popular choice bishops.
This group of popular choice bishops had no keys of the kingdom and so their work was not recognized by heaven. No true work of the ministry.
So a false form of religion took over the true religion. Eventually that spread over the entire church. The false front being a little more glitzy, and ceremonious, with some major whistles and bells and thrones, and empires and such, was attractive to the people. They even had Jesus as the example and taught the sermon on the mount, but the keys were missing.
Like Jesus told JS, there was a form of godliness, but they denied the power thereof. Exactly. They had a form of religion and it has stood since 120, but they did not have the power of Jesus. (the keys of the kingdom of God) So fairly early on, Jesus allowed the churches their own form as they wished, but moved into his alternative plan, and all will be fine. All will still be saved who do as Jesus commands.
And I will add that, God has had to move to his alternative plan many times throughout history. Let me give you a coupe of examples.
Enoch walked and talked with God and he built the city of Enoch. A beautiful city of love and the word of God. But not many years after Enoch, God had to change plans, and go to an alternative plan. He had to destroyed all life on the earth, move them all to the spirit world and teach the innocent there, where they would not be under the influence of the dire environment that they were on earth. They could then be baptized and receive other saving ordinances by proxy.
Another example is the children of Israel. They almost totally rejected Jesus as their God and so he rejected them. He move them to his alternative plan and allowed the false religion to move forward on earth, but when they died, they were taught the truth, and would receive all the saving ordinances by proxy.
So Gods alternative plan is a good plan that has save billions of people into his kingdom. The work of the dead is such an essential work that Jesus even said if it was not done, he would have to smite the earth with a curse:
Malachi 4:5-6 King James Version (KJV)
5 Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the Lord.
6 And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.
The turning of the fathers to the children, and the hearts of the children to the father is "the work for the dead". Our hearts are turned to our forefathers who have passed away, we find their names and all we can about them, and then we do the saving ordinances for them by proxy. They turn their hearts to us and help us find them and take care of them. That is why I say it is the most spiritual work you will do because our fathers are reaching through the vail to provide us with information about them, and there are many spiritual moments when we find information that has been lost for centuries about a particular person, but then is found.
So come to understand the alternative method of salvation, you will find a rich spiritual experience.