I personally think the producers had a daunting task. They had to condense history spanning thousands of years into a 10-hour series, and not step on any toes in the process, but still make something the captured interest and entertained the audience. Indeed, they have left out details, some of them very important, but it seems the details are always centered around something which is either controversial in terms of how various Christians interpret it, or things that are just too difficult to convey in the time-frame available. The story of Lot and his daughters are in this category, I believe. It would have taken too long to establish the back story, to show how the actions of Lot and his daughters was righteous and not something perverted and freaky, and very non-righteous. Rather than commit to the time they would need to convey this, they chose to skip it a move the story along. Again, this isn't a documentary.