"Right..." That didn't answer his question, did it? He's not sure if it was supposed to. Perhaps the number of people is the reason, rather than a reason to avoid it.

But just as confusing is Aziraphale's impression that going home is something he might someday be able to do. Sure, he's an angel and maybe death means something different than it does to a human, but it seems to him he'd wonder if it's possible in the first place before trying to work out how.

"Have angels come back from the dead before?" Maybe that would explain it.