For ages, AAA games were classed as such by brand recognition, not by quality. Inevitably, they devolved into being just a platform to sell microtransactions. The shareholders want their dividents and the CEO needs a new yacht with coke and hookers.
It’s too easy to exploit the dopamine rush playing the new, official installment of a well-known series. Even if it’s terrible, the customers get their joy by ranting about how trash the game is and how they hope the next one will be better. BG3 being an actual game does not change anything and will not reset expectations.