Eh, it wasn't something I deliberately cultivated. It's just that years of gradually being worn down by disappointment have left me unable to be outraged by this sort of thing except for really egregious stuff done by people who should know better. I don't have en endless supply of emotional stamina, and I now conserve it more carefully--one bout of serious depression brought on in large part by flogging myself over things I cannot change was enough for one lifetime.