My world doesn't work like yours does at all, but I can take enough of an educated guess what it's like from what I've been told.

[Which is to say, he'd be way fucked up if trying to revive the dead had those kind of consequences back in his world. Him being like this only came about because of his efforts to save John. If things were different, if alchemy were all he had...]

[He turns his attention to the apology.]

Thanks. And for my experience, dying is always terrible, but the sympathy helps. At least you had a good reason when it happened.