Yes it is the very issue because as pointed out in
Evidence for the historical existence of Jesus Christ:
Jesus as historical myth and The Tabula Rasa Jesus
Remsburg pointed out:
"A Historical myth according to Strauss, and to some extent I follow his language, is a real event colored by the light of antiquity, which confounded the human and divine, the natural and the supernatural. The event may be but slightly colored and the narrative essentially true, or
it may be distorted and numberless legends attached until but a small residuum of truth remains and the narrative is essentially false."
So
even if Jesus is a historical myth (ie was a flesh and blood man) you could have the issue of the Gospel narrative being essentially false and telling you nothing about the actual Jesus other than he existed--effectively putting him on par with Robin Hood or King Arthur, who have had historical candidates suggested as much as 200 years from when their stories traditionally take place.
To make Jesus more than
that a researcher has to assume
some parts of the Gospels narrative is essentially true. But which parts? In answering that question all supporters of a "historical Jesus" get into the Miner problem of effectively turning Jesus into a Tabula Rasa on which they overlay their own views.
"The "historical Jesus" reconstructed by New Testament scholars is always a reflection of the individual scholars who reconstruct him. Albert Schweitzer was perhaps the single exception, and he made it painfully clear that previous questers for the historical Jesus had merely drawn self-portraits. All unconsciously used the historical Jesus as a ventriloquist dummy. Jesus must have taught the truth, and their own beliefs must have been true, so Jesus must have taught those beliefs." (Price, Robert (1997) Christ a Fiction)
The fact this keeps happening shows just how little definitive information on Jesus there is in Paul's writings and the Gospels.
Price points out the problem and its result:
"What one Jesus reconstruction leaves aside, the next one takes up and makes its cornerstone. Jesus simply wears too many hats in the Gospels – exorcist, healer, king, prophet, sage, rabbi, demigod, and so on. The Jesus Christ of the New Testament is a composite figure (...) The historical Jesus (if there was one) might well have been a messianic king, or a progressive Pharisee, or a Galilean shaman, or a magus, or a Hellenistic sage. But he cannot very well have been all of them at the same time." (Price, Robert (2000) Deconstructing Jesus, pp. 15-16)
"My point here is simply that, even if there was a historical Jesus lying back of the gospel Christ, he can never be recovered. If there ever was a historical Jesus, there isn't one any more. All attempts to recover him turn out to be just modern remythologizings of Jesus. Every "historical Jesus" is a Christ of faith, of somebody's faith. So the "historical Jesus" of modern scholarship is no less a fiction." (Price, Robert (1997) Christ a Fiction)
------
We have seen this process with King Arthur and Robin Hood where the stories are reinterpreted for each generation to promote a particular view of those people. We have seen it with Jesus with him as the 1st century equivalent of a flower child Guru, a follower of Buddhism, or about any other idea that has come across the deck.