Hello brother. First of all, I don't think I've ever interacted with you yet, so welcome
If I were to think like the enemy, there are some things I really would not want.
It'd be very helpful to my cause if the church never came to a clear idea on the nature of Christ, and whether He was really God, mostly God, or something else altogether. If you don't fall in with the first of those, you are a heretic. There was nothing really helpful to the devil of getting a mass of pastors and theologians together and act as iron sharpening iron to debate these issues and come up with clear definitions that, 17 centuries later, are still the standard of orthodoxy.
There were other unhelpful developments as well. The Synod of Dort was called by the Netherlands Assembly, so we have that governmental body to thank in some degree that we are five-point Calvinists. And the Five Points as based on the developments of that synod have been a glorious Gospel preservative ever since,.
And where even to begin with the Westminster Confession, the Larger and Shorter Catechism, the Directory of Church Government, and the timeless 1650 Psalter? Who called this assembly? The British Parliament!
And again, these works are the litmus test for orthodoxy, more or less. Some disagreements on some points of the Westminster Standards, but for 370 years we are still referencing, reciting, studying these works for the fact that they are comprehensive, clear, concise, convicting, compelling. The church can never go back.
If this was the work of the devil (which I utterly deny and repudiate), it was a boneheaded thing for him to do, as the church has been marvelously fortified ever since, so long as she holds fast to these standards.
I'll let historians address issues of whether the church could have done this without the help of the governments, but I cannot conceive of churches being able to go to the time and expense that these assemblies would have required without a lot of help. Travel, expenses, pulpit supply, arranging the meeting place, tracking delegates, coordinating schedules, committing to be out-of-towners for lengthy periods of time, and doing this with north of 100 men... that's a huge amount of resources to be expended.
Government funds put towards such magnanimous efforts, in my mind, are well spent.