Personally, I think that it indicates that the Gospels use Jesus as a vehicle for allegory, much as Plato uses Socrates. There is no need to establish whether the words were accurate to real historical situations, because the message not meant to be shaped by the situations, but rather the other way around.Hmmm a good point Luis. I have long wondered about the missing years. As a story its patchiness seems to make it more plausible. Fiction would likely be a little more creative.
I suspect that the most likely scenario is that his life during that period did not fit in with the overall narrative. Probably got married and had kids and maybe family dies in an epidemic and like many grief stricken people, he turns spiritual.
I assume that very early Christians knew that, but fairly quickly that understanding was lost due to overzealousness or other reasons.