I and many others have no problem accepting the scriptures as we have them today in there entirety. Many have sought to determine the question of which books belong among the Scriptures.....if one looks into both sides of the issues concerning this it does not take long to determine and see that “other” so called books/writings were never quoted by the apostles or Christ. That's a pretty good indication in and of itself. Of course there are other tests one can also use to determine this....many of the other books are fairy tale type stories and though might be an interesting read they do not have the affect on the soul I have found in the scripture as we have it now.
There is also the lineage of Joseph given in addition to Mary...and with good reason...we find throughout the old and new testament the complete historical record of the lineage of Christ....and important that that be so for obvious reasons.