Wow-
In a country where most people don’t even know what dispensationalism is, you find people writing a fact based retrospective After Action Review.
Sadly for many churches, many of these ideas have been incorporated and they in part persist even today among many Christians especially in the US.
That is why doctrine and tradition matter. It should ward off / resist the incorporation of herecy based on the idea that 1) the Bible has a flaw in it and we figured out what that is. 2) Someone had a vision and wants to add to the Bible. 3) People for 2,000 years just had it wrong. Let me show you how to really interpret XYZ. 4) Some modern (paradigm) that has not Christian connection in reality gets incorporated into the church (socialism, feminism, animal rights, LGBTQIA, climate change, a drug lord saint...) These are the 3 basic origins in most herecy you have today in Christianity.
4 not 3 reasons.
Typing on a phone keyboard.
That is why doctrine and tradition matter.
regarding tradition, Jesus didn’t think too highly of untested tradition:
(Mark 7:8) For you ignore God’s law and substitute your own tradition.”
(Mark 7:9) Then He said, “You skillfully sidestep God’s law in order to hold on to your own tradition.
(Mark 7:13) And so you cancel the word of God in order to hand down your own tradition. And this is only one example among many others.”
Note Jesus did not say all traditions are bad, just to test them.
Personally, I find the old doctrines well tested.