Ah... [He nods slightly, in a understanding sort of way. Survivor's guilt he gets. He's been through that.]

You're not the first person to ask me that today. [He shrugs.] Obviously, I dunno the answer any more than you do. Hell, I could almost ask the same thing when it comes to me. I'm exceptionally talented by my world's standards, sure, but I don't have magic bullshit powers or anything.

[He's also done some things that REALLY don't make him worthy of surviving over innocent people.]

But, it's like you said, there's a reason for it. So put that guilt to use and start figuring out what that reason is and what you've gotta do to fix the situation back home.