My friend, the process of canonization of the books of the Bible cannot be fully attributed to “Catholic Councils”. The process of determining the canonized books was a process that occurred over a three hundred year period. Most of the NT canon was accepted as such in the first hundred years, before there could be said to be a church under the authority of the Bishop of Rome. Believers in Asia and Africa, in many cases having divergent views, sometimes bordering on the heretical, also contributed to the acceptance of canon. Some books weren’t immediately accepted while a couple accepted by some groups did not stand the test of time and were thrown out. By the 4th century when the councils met and the canon was formalized, it was already generally accepted which books were inspired.
You are correct in saying that Revelation is one of the last to be accepted. But, having said that, it was. And, given this, it must be believed to be just as true and authoritive as any of the gospels. Ultimately, the determination of which books are worthy to be called scripture is determined by no earthly person but by the Holy Spirit who resides in all believers.
Incorrect.
Men and institutions make a determination about which scriptures are inspired by the Holy Spirit.
Look at the difference between a Catholic (and Orthodox) Bible and a protestant one. They are different because men made the decision to remove or include certain books.