The "doctrine" changed.

Christianity, as we know it...
-- Is a Gentile Creation.

But...
Jewish Christianity...
-- The version of the sect that got wiped out by Post-Constantinian Christianity...
Believed Jesus was a MAN, born of flesh and blood in the usual manner.

From the perspective of JEWISH Christianity...
The genealogies are required for two reasons...
-- The first (Matthew's) is the Succession of Royalty through the Throne of David.
-- It is a list of kings.

-- The second (Luke's) is the actual bloodline that shows Royal Descent...
-- And, therefore, the right of Succesion to the Royal Throne of David.

Why the Gentile Church allowed them to remain...
Without understanding their actual importance...?
-- I have no idea.
But...
It is possible that, by the time of Constantine...
The Gospel "genealogies" were too well known to simply erase from the books.

Still...
The curious fact remains...
-- They ARE there.
And...
The inclusion of these "genealogies" only makes sense from the perspective...
Of the original -- i.e. "Jewish" -- followers of Christ.

-PRev1-