hmmm

Through out genesis we have been able to at least for the most part been able to understand why whoever wrote this, wrote this, yet here i am somewhat failing to see a purpose in what is in genesis 12-19. First of all , what the hell is brimstone? Clearly it is some destructive force of great magnitude that god has power over, yet throughout the bible there is not description of what it is just its effects. Why don't we know what brimstone is? What could it be based off of? How could this be lost in transition. Also what is the point of writing about incest? i would understand if the children that Lot has with his daughters were cursed but here it doesn't seem to have any reprimand to incest. Why isn't the bible condemning incest in this section, because it does condemn it in the bible. This passage almost seem to be promoting it, because if its in the bible without consequence how can some one argue against doing it. Wasn't salt considered valuable back then, so then why would god turn Lot's wife into a pillar of valuable resources? why not just regular Rock? I also kinda feel like women are never birthed in the bible, they appear but it never says and she birthed before him a woman, its always sons. I understand the benefit of having a son but the women have to come from somewhere