Because it only caters to a Karryn who's already slutty. Part of the reason this game is so loved by the community is because it offers the slow, dynamic corruption of Karryn. Even if you do multiple runs on the same difficulty, getting the same edicts and doing the same activities, chances are your experience will be different each time.Why are people so upset about the gym dlc?
You don't get any of that with the Gym sidejob, so it doesn't feel particularly interesting to play to people who might prefer pure/low-slut Karryn.