I've just come back.
I spend my life looking at late-classical texts and manuscripts, and the fact is that your little syllogism:
The less than competent scribe put this into Greek as "Virgin". So the entire foundation of the Catholic Faith and a major supporting girder in all the other Xtian variations is down to a translation error.
makes it appear as if interpretive errors (of anything) are down to 'a guy' 'making an error'. It simply doesn't work that way.
Whatever you, or anyone on here, has invested in deriding religious tradition, making it sound like these institutions (whichever one we are talking about) grew out of some individual's cynicism or some malevolent collective is to grossly simplify the way history and human movements work. It hurts my head to read the kind of drivel I sometimes see on here, in the same way it must hurt a medic's head to read silly medical opinions, or a lawyer to read someone's ill-informed legal assumptions.
If you want me to be more specific, take a class from me.