Science assumes that the Big Bang was how it started
Science assumes nothing. It puts forward a raft of theories, then says that such and such is the most likely due to X, Y and Z.
If the majority of the human race had been homosexual, I'm sure evolution would've gone a certain way to make sure homo sapiens survived as a race
Unlikely. Humans are hetrosexual (usually) because that *is* our way of surviving as a race. There is a good reason that almost every animal species on the planet evolved this way.
What surprised me about the books was that they changed the author for the TOB book ( probably because they realised the others were c%^p ) and that one is actually not badly written. Not true to the game but still not a bad read.
The first two books were written by the same person. He would have had meetings with the team and design docs to go on. His characters may be highly accurate, but were simply changed later, who knows?
The last book was written by a member of the
ToB team, and thus likely had a better inside knowledge of developments. It would of course have been limited in what it could do by the previous two.
The writing of the first two is indeed dreadful, and you can tell this simply from the free extracts alone.
Normal is only what the majority believes to be correct, it doesn't necessarily guarantee that the belief is correct
Normal is effectively the standard, and the majority of humans are hetrosexual, therefore hetrosexuality is normal. This doesn't in turn mean homosexuality is abnormal.
Game content is hardly what I would use as a way of arguing sexuality for Imoen. Her enviroment and the way she has lived makes for far better ground.
For example, Candlekeep. It seems clear her closest friend was you for a very long time, and the two of you share a tight bond. If she showed interest in no one else, perhaps this is the factor that decides her leanings?
Then there is Irenicus. All sorts of terrible things were done to Imoen. Perhaps this puts her off men forever, now that she has seen what they can do? Or perhaps (if the player is male) this simply acts as a way of driving her into their arms as she comes to rely on them in a time of great stress.
Stop thinking about what happened in the game and consider the consequences instead.