Okay, let me ask you a question, would you really like it if your future girlfriend, or the girl you're already in a relationship with, told you who she slept with in the past, or showed you photos or even videos of her orgies? Would this information be very important for building a relationship with her in the future? And, of course, if you like it, I don't mind, it's your business, but not everyone will like it. And yes, this is certainly not NTR, but not everyone wants to see flashbacks of their LI participating in sexual scenes or orgies. And such moments from the past should remain in the past if the player can get all the information from conversations.
Would the game lose much if, as you say, these 10 images weren't included? Would it really affect the plot that much?