Because it’s essentially day 1 dlc. They’re withholding content from behind a paywall for a premium game. You’re getting suckered into paying extra for content they have already made. It serves no purpose other than to extract more money from you... because they can. Notice they don’t do this with the steam version because they know ratings and user feedback actually matter on steam. They will absolutely get demolished in the comments if they dared to try this on pc.