You want something done right, you do it yourself.
With this in mind, I think if the JC guy had thought a book was going to be a big deal, he would have written it himself. Hell, who better than a carpenter to carve it in stone? (OK a stone mason)
Plato wrote his own stuff - brilliant
Aristotle's pupils wrote most of his stuff - boring as boring can be
JC's pupil's pupils and pupil's pupil's pupils and pupil's pupil's pupil's pupils and even pupil's pupils' pupil's pupil's pupils wrote his story even though he never asked them to.
Buddha could teach truth with a flower, I think JC and others can as well, but oh no, the "fathers" sat down and said, we can't have an oral tradition that effectively would have come to everyone who ever heard it directly via a line to JC himself, what we need is a big fuck off book that will impress people, make us powerfull as the guardians of the word of god. Our own christian works are a bit of a mess and we can't agree on the silly things and besides they make us less important, so let's include the Jewish tradition, that will make it a much bigger book. Size matters even in theology apparently.
What a load of horse manure.
Those who have ears, let them hear.