I never mentioned TE's, but they are cherry-picking: they arbitrarily label some sections as 'metaphorical', and keep the rest as literal.
Though we agree that the fact/fiction ratio of the Bible is irrelevant, I'm curious: what parts do you consider to be factually accurate, and, if any, why?
I believe, based upon my reading of the Bible, that God has two primary purposes in dealing with humanity, to teach us how to "act justly, love mercy, and walk humbly with our God", and to lead us to salvation.
I further believe, also based upon my reading of the Bible, that God has largely constrained himself from directly and overwhelmingly interferring with our freewill.
Here and now I will not debate how I came to those conclusions or why God would do this.
Based on the above I would suggest that the strongest constraints that God has placed upon the writing, editting, translation and preservation of the Bible involve the above purposes.
God has inspired various authors who then, to varying degrees, filtered that inspiration through their experiences and understanding of the world as they strove to communicate that inspiration as best they could.
What do I consider to be literal vs. allegorical?
I examine the Bible similarly, though with notable differences, to the way I examine any text. The most notable difference is that I am far more likely to accept as possibly factual any depiction of supernatural events. Beyond that I look for clues to the backgrounds, the points of view of the authors.
What spin are they likely to put on what they write? What is the purpose of their writing, what sort of message are they trying to get across?
e.g. when I read a science fiction morality play I don't critique it based on the fact that the story violates physics in 17 different ways. But if it references history to bolster its case I would want to know if the history is accurate. I would critique it based upon how accurately it portrays human behaviour.
When I read science being explained by an enviromentalist/industrialist I expect a certain amount of spin.
Numbers of people cited in historical accounts can be automatically taken as inaccurate, and the bigger the number, the greater the inaccuracy.
"Thousands" = a lot of people
"Millions" = even more
When I read about the history of Israel and Judah in the Bible I expect to see history being put in context of religious beliefs, I expect to see leaders who were righteous being puffed up a bit, and those who were not minimized.
The first eleven chapters of Genesis appear to me to be fairly clearly mythical in nature. Beyond that, my assumption is that most everything has a kernal of historical reality behind it.
One of the primary lessons of much of Hebrew Scripture is that God provides what is needful, that he leads us on a journey home, that we have repeatedly turned away from him and ended up in the wilderness as a result.
I haven't thought about it much, but I think that my faith would be seriously damaged by gross and pervasive historical inaccuracies in the Bible that affected that lesson.
Is this position "defensible" in a scientific sense?
No, of course not, that is why they call it faith.
OTOH it is pretty much internally consistant, and not arbitrary.