Neither is diplomacy.
But please undersand that it's papal idiocy and error which makes Infallibiloty so important, for it merely makes the guarantee that erroneous papal opinions (and he's go a bunch of them) will not become binding as part of doctrine.
It works only negatively: it is pretty satisfactorily explained by the following video from the Bad Catholics Bingo Hall (YouTube) which shows a curious connection between papal error and myocardial infarction.
(For your viewing pleasure. I will not mind of you laugh out loud.)
ROTFLMAO!