[Aziraphale frowns- a world where angels and demons do not exist would maybe imply there's a world where God isn't orchestrating everything, where everything isn't part of some great plan... and the thought makes him uncomfortable in a way he doesn't really want to put into words, so he skips over that point.]

Your 'baggage' is hardly your fault, all you've been through was basically tossed at you with you having little to no say in the matter. [He knows, logically that Rich had to say yes to the SQUIP. But he couldn't have known what was coming his way.]

But still, thanks for being so accepting. Humans- well. Not all of them react so nicely to the existence of- well. Me.