I agree that lore for side characters are awesome, and is something i'd definitely do, but these people put WAY too much into their backstories.The proper response to anyone who threatens suicide is "DO IT FAGGOT".
Side characters aren't a bad thing. Giving a game lore even if its shitty gives fans something to think about. I'd be lying if I said that yandere simulators lore didn't pique my interest even a little bit. It creates a much more realistic world that players can place themselves into and play with, and outside of it, it provides a much larger platform for OC, speculation, and discussion, which is all good for a games publicity. Of course lore isn't necessary but its interesting nonetheless.