You seem like you need the help and I don't walk away from something like that. Doesn't matter to me that this isn't my world, I'm still a doctor and it's my duty to help people, regardless of where they come from. Besides, I've saved more than one world in my time and one thing I've learned is grand stands are all very well, but sometimes you just need to keep going, one person at a time.
And anyway, the question I ask you back is, why not?