Black Isle wasn’t the Main Developer of BG and BG II , that was BioWare, sadly they have lost thier Ability to tell great stories,at least Mass Effect ( I-III, except the ending) and Dragon Origins where the last good ones. DAI was one pile of crap.
But Beamdog was founded by two Ex-Bioware’s, Trent Oster and Cameron…

EDIT EDIT EDIT:

There is maybe a way to bind the two main theories together. If you follow me, the whole thing could be a story about the creed for power ( also a common fantasy bias ;-) )