"You know, I have a theory about that," Frisk says, gesturing vaguely with their fork at themself and Baiken. "So. The reason why all of us came here at once is because the world's about to end, right? This place needs heroes, or at least people who are willing to try to save the world. If absolutely normal people were showed up, they'd just sorta... blend in with the rest of Vaikuntha. Adjust to new lives. They wouldn't do weird adventuring bullshit. If I was an absolutely normal kid with no trauma, do you think I'd be down here fighting monsters for the better part of the month? There's a reason why we, specifically, were all brought here, as screwed up and weird as it may be."