As seen in many of the documentation, these documents were from 2020 and even earlier.
At that point, BG was set to be a decent game, but still being done by a small studio and far from finished. For a normal company, the development and production time for the game was stretched so long it was doubtful that it would see completion and if it did, it would probably be rushed.
Instead Larian got enough backing to finish it.
Besides, traditionally, that style of RPG is a niche market that does have a rather well defined target audience, but not an especially WIDE audience.
The fact it broke out of its niche and got such wide appeal is in fact not something you would've guessed.
But even with the needed context, the wording they used was rather harsh, to say the least.