Okay, "The Changeling" is WILD, Hear Me Out...

So, I just finished watching "The Changeling" (1980) and HOLY CRAP, you guys. I went in totally blind, just knew it was supposed to be spooky, and MAN, it delivered. The whole vibe of that super old house in Seattle where John Russell moves is just... ugh, unsettling. Like, you know something messed up is gonna happen the second he walks in, right? Okay, here's my theory though, and tell me if I'm reaching. I think the whole thing is more than just a ghost story. Yeah, the kid's ghost is obvs the main driver of the plot, but what if it's ALSO about how John is dealing with his own trauma? Like, he's projecting a lot of his grief and guilt onto the house and the ghostly happenings. The way he gets so obsessively fixated on finding out the truth about the kid feels like he's trying to solve something for himself, too. Maybe, subconsciously, punishing himself or something? There's this one scene where he's banging on the walls trying to find the hidden room, and it kinda mirrors how he's smashing through his own emotional walls trying to deal with his past. IDK, maybe I'm overthinking it, cuz it IS a super creepy ghost story, with that wheelchair rolling down the stairs (!!!), but I just feel like there's a deeper layer there. What do you all think? Am I totally off base? Or is there something to this theory? Also, side note, the director wasn't a nobody, guys! It was Peter Medak. I almost had a heart attack, I feel like I have heard that name before somewhere. Anyway, it's a good movie and I'll probably be obsessing over this for a while.