I would argue that the center of influence, power, and control over Christianity has changed several times over the course of Christian history for a variety of reasons, and the exact nature of how a particular empire, country, or city exercises its power (and the reasons that it does so) have been somewhat fluid as well. As you mention, the Council of Jerusalem is well described in Acts- Jerusalem, of course, the holy city that the apostles spent their time and energy on initially, and for some time all Christians continued to look to it as having a special place of power and authority, as the originator and source of Christianity. Then throughout much of the first millennium, the Byzantine Empire was the most powerful center of authority in Christendom. Look to the seven ecumenical councils- Nicea, Constantinople, Ephesus, Chalcedon, back to Constantinople two more times and then back to Nicea. The Byzantine Empire, parts of what would later become the Ottoman Empire and then Turkey, and portions of North Africa- these are the places where power and authority within Christianity came to dwell. But like Jerusalem before it which fell to invaders, and to some extent like the western half of the Roman Empire which also fell to invaders and kept it from being as relevant as it would have liked, North Africa and the Byzantine Empire lost much of their influence on account of Islam.
Then the bulk of power and influence in Christianity was claimed by cities on the Italian peninsula. The Protestant Reformation did much to change the nature of how that control is exercised, but Rome can still claim to have preeminence where influence and control are concerned. I guess this is the main point, though- that sort of power, influence, and control has always been something that’s moved around and been subject to change. In recent centuries (approximately two of them, perhaps one and a half) the United States of America has made great strides in closing the power gap and elevating its level of influence on global Christianity. Great powers rise and fall, and the nature of control and influence is that it changes over time. There may come a time when America clearly has more influence on Christianity than any other country in the world; there may also come a time when America becomes less influential in that sphere. It’s the same thing for Rome. You may well expect that Rome will not stop being the most powerful center of influence and control in all of Christianity within your lifetime, but you should not expect its place and its role to stay exactly unchanged. You should also not be surprised if some other part of the world becomes more powerful and influential than it currently is- I would certainly expect the USA to continue increasing its global influence while China makes a major move of its own, along with Brazil but perhaps to a lesser extent.
Rome is currently the most highly visible city in the world when it comes to power, influence, and control over global Christianity, but it was not always the most highly visible city in that regard, the nature and extent of these things has been fairly fluid, and while Rome may be the most visible city, it is not the only visible city nor is the Italian peninsula the only visible part of the world where global influence on Christianity is concerned. There are other parts of the world that deserve attention, and it may be that one of them eventually comes to deserve more attention than Rome currently commands. Also- there is nothing particularly wrong with wanting some change, or even an entire shift, in the nature or location of the central focus of Christianity. We haven’t reached a final landing point. The center of Christianity has moved before, and we were fine. At some point, it will probably move again, and it’s entirely possible that it’s started to happen already.
If there’s a way for history to lead to Protestantism, particularly an American Evangelicalism that probably has less in common with Reformed Protestantism than the Reformed have in common with Catholics- that would probably be the basic reasoning you’re looking at.