The way i see it is that every options are about blaming the grandparents exclusively and thus making certain that the nimbus of dad remain unblemished. As if dad
must be the good guy in this story and so the grandparents have to be the bad ones, yes? No.
This idea deals with that 50% if them grandparents are to blame. I sign these. Sure thing no problem but this just 3 options from the angle IF they are the culprit here. What if dad is to blame.
Dad is a saint is seemingly hard coded in the fanbase here yet i prefer a more pragmatic approach. I will buy the "Elitist Grandparent" explanation as soon as we meet them and they prove it to be correct. Untill then lets not forget that it is Dad who keeps us away from them and not the other way around. It is dad who prevents us from making a judgement call. We are old enough. He could have said that okay, lets make a visit and you can see for yourself. But he isn't exactly eager to let us make the connection now is he.
We were a child before so yes, why not. But we aren't anymore. The reason we don't care about our grandparents.. is him. Solely. He instilled the idea in us that they are the bad guys. Nothing proves them to be beside his words. They aren't able to defend themselves or even put up a counter arguement now can they so we are left to believe whatever dad says. A very convenient position to be in.
Its very easy to manipluate the reader/player if the player believes everything the narration says while it was told from the point of view of an in-game character. The idea here is that players think the writer wants them to tell the hidden truth. I can't tell you how many times i tricked my players with such false narratives. It always works. They always expect likable NPCs to tell the truth as if they know the truth and have no other agenda beside transmitting storyteller info.
I see the same here
What if dad has reasons to hide the past because he fears he'd lose us if he'd tell. Is afraid to come clean. Its a very legitimate fear for a parent. What if he himself never came to terms with that past. He couldn't let himself fall apart he had a son to raise. Not everyone crumbles under such pressure but the meantime keeps it in the closet unable to burry it for good. I suspect skeletons in dad's closet. But its just me.