It's something that has been bothering me for a while in video games. This need to be the prettiest thing to ever be rendered on people's top of the line PC's, despite it being not only useful for a minor portion of the playerbase (Console players and most PC users are limited by hardware anyway), but it's overall irrelvant to the actual product...
I agree with that. BG3's cinematic nature is even kinda at odds with the systemic nature and relative freedom it tries to convey. Cinematics are "fixed", after all. Whereas genuinelly Immersive Sims Larian has admitted to being influenced by don't at all deal in cinematics except for in introductions or in between levels for reason. It's a ton of work having cover-ups for everything, so that the cinematics don't break (I did so in Early Access already by throwing a bunch of undead into a fire-trap far away before they rose -- the cinematic still showed them rising in their scripted place).
However, that was, naturally, the bet. Take a popular IP, pair it to triple-A and mass market presentation, and that shoud elevate the already successful prior game to the next audience level. Others try to do such also. With exceptions such as From Soft by changing their games from the ground up though...
Thus it's good that indie and A/AA isn't going to go away. At the same time, a game like BG3 is much more likely to make somebody check out Pathfinder, PoE et all than a Witcher. Which really isn't far removed from an Ubisoft open world action game.
