Prove it.
If not, why the need for a different denomination?
Geography? Maybe because not everyone can go to the same church across the country every Sunday and not everyone would fit in the building anyway? People tend to pick local assemblies.
Do any of the 33,000 some odd “Protestant” denominations agree on everything?
No, and they don't need to. There are issues that are not salvific in nature.
Do all Catholic rites agree on everything?
If Catholic rites have leeway to disagree, then why do Catholics hypocritially demand that all non-Catholic churches agree on everything and hold non-Catholics to standards they don't even hold themselves to?
If any two do agree, why do they not MERGE? Because they DO NOT agree!
Because they don't want to. Is there a problem with that?
The Tower of Babble was indeed about communication. And the communication of FAITH is the most important form of communication, would you not agree?
And the Protestant Faiths can't agree on much of anything.
Of course, this is why Protestants need 33,000 denominations. And the CATHOLIC faith is the SAME as far as DOCTRINE everywhere in the world. Different “rites” only practice Mass a bit differently.
The Catholic Faith has survived over 2000 years. The Orthodox Faith is nearly identical to the Catholic Faith and it, too, has survived intact.
But the Protestant Faith is a comprised of many good people who argue about silly things, and do not understand each other. They “babble”
There is a need for authority.
I am a Catholic who often objects to Catholic authorities but I am allowed to do so, to a point, and remain Catholic.
What does it REALLY mean to be a Protestant? Other than taking shots at the Catholic Church, which PRODUCED the first Bible and kept the Faith secure until Martin Luther, the Book of James hating anti-Semite, what do you have?