That's what I thought you suggested. Sounds interesting, but the first thing I thought of was the Indoctrination Theory of Mass Effect 3. And it's not a good thing for one big reason:

The indoctrination theory was some sort of alternative explanation for the bad writing bits of Mass Effect 3 (I doubt anyone would have thought of this theory if the game's story was able to deliver a satisfying conclusion). I just don't think Larian are clever enough to pull off something like that. The good news is that we don't know yet either way.

Larian's Biggest Oversight, what to do about it, and My personal review of BG3 EA
"74.85% of you stood with the Tieflings, and 25.15% of you sided with Minthara. Good outweighs evil, it seems."