It is a great story!

Jesus is indeed the Son of a Symbol - his power - indeed the incredible power of all MYTHOS - does not come from the details - the number of wise men nor the names of his parents nor the species of barn animals accompanying him in the stall.

I would argue that historicity has no role in philosophy - what matters is what was done - indeed what IS - the divine sacrifice covers our failings and gives us purchase to recover beneath infinite grace and become better humans - stronger souls.