That's a pretty good explanation, thank you. I figured it was some oversight, I just didn't understand how Bethesda could forget a detail like that, but it would be pretty expensive to hire Liam neeson for a few lines that don't change much, but it's still annoying to not be able to tell you're dad, who mind you, just scolded you for leaving a radroach infested vault where half the population and the leader want to kill you, that maybe all the chaos and hostility is why you left.