What an increasing number of strong thinkers resent is a crackpot story that is built around the tale of a miraculous virgin birth of the son of the universe, no less, who is part man , part his father and part the Word . And thereafter it drifts into some yarn involving resurrection after death et etc , promises of a heaven , judgement , possible eternal punishment and all sorts of fairy story telling .
All justified by nothing . But let's give that a name -- Faith .
Strong thinking also notes that the focal point of the earliest written accounts (Mark and Paul) is the resurrection. Without the resurrection, and as you point out, we have nothing new, although perhaps fresh attention given to older truths.
The resurrection shines a light on the teachings Jesus chose to emphasize. Judaism--and Jesus--speak of how to live
this life. I am a witness that putting what Jesus taught into practical use in my own life made/makes a huge difference.
When someone has such a profound effect in advancing one's life journey, it is natural to want to know more about that person's personal life, how he saw himself, and how those close to him saw him.
So , the bit about Wisdom is hardly relevant -- do you really imagine that any cult philosophy or creed is ever going to be offered to the Sheeple that has a zero pay-off angle? They maybe eternally Gullible and not very bright, but they are not totally stupid .
And a possible happy ending is necessary , however improbable .
Which is why "we" work with more probable and intellectually satisfying narratives. imho
You seem to see all the lemming/Sheeple running off a cliff over a virgin birth. Here is how I see it. How Jesus was born has zero impact on my life. Calming the sea has zero impact on my life. Feeding five hundred people has zero impact on anyone's life. Your 'strong thinkers' who study such things are oblivious, trapped in oblivion, and fail to see the obvious.
People want to know God, to draw closer to God, to actually see God in the midst of their life. (God in our midst.) The question about Jesus is not, Was he born of a virgin? The question is, Does he, and do his teachings, bring us face to face with God? I testify that this is the exact impact Jesus has had on my life, having an actual experience of God, having God in the midst of my life.
Yes, you can say, "Search for the same thing he taught here, search for the same thing he taught there," but what is wrong with studying--and practicing-- his teachings as they are concisely presented in the New Testament?
Think about it. If you appreciate what Jesus taught when those teachings appear somewhere else or were also said by someone else, what makes you unable to appreciate those same teachings from Jesus?