Yeah, yeah, I get it
. But you know what I'm saying
. Even if we are not on Jill path, or Bella, or whatever, these girls are not removed from the games. MC will still interact with them, he probably gonna help with their shit and etc.
so let's say this House theory is true. MC one way or the other, he gonna find out, that this is the House his Dad was working on and that's how He meet MC's mother. This is the background story, the fact in every path regardless of the girl you are with , but its only have a "bonus" meaning if you specificly on Jill path. I think this is kind of the way how it should be handled. As You say, MC background story have to be explained regardless of his relationship. So His background gonna be the same in every way, just there will be some bonus, if you are in a specific girl path.
Just like the library scene with Bella, that's exclusive to Bella, you don't even see it if you are not on the Bella path. I think this House and "Destiny " thing that Jill talking about, is her "library scene". and I guess the other girls will have something else along the road, that is unique to them