The burden of proof that the writers made up incidents relating the real ministry of Jesus is yours.
The proof is in the christian bible as the gospel accounts are not congruent in relating the "facts" concerning the ministry of Jesus. Or his lineage. Stories such as his birth in Bethlehem were obvious attempts to connect him to the House of David.
You've got nothing to support your theory.
Contradictions, outlandish claims, and obvious later edits abound in the New Testament. The best explanation is that the books were cobbled together and attempts were made to make them look like the fulfillment of earlier prophesies. That's much simpler than trying to explain away the textual discrepancies. Occam's Razor.
Many people are content with treating the bible as inspirational literature and revere it as such. A story needn't be historically accurate for it to be meaningful.