Today SD is actually cheaper per gb than Blu-ray.
Just checked Amazon prizes for the first best SD card and Bluray disc. This is a lie. Discs are still less than half the prize.
And you didn’t take into consideration that it’s much cheaper and faster to press the data onto the disc than writing on an SD card when you do that in great numbers.
It’s not that long ago that I played both KOTOR games for the first time and I have to agree that the game might not be that intuitive by today standards. But now after a lot of people played BG3 it might be not that hard anymore to figure this game out.