He rounded on Obito, awful and ugly with rage and a number of emotions that he didn't even have names for.

"This isn't about you, Obito! I'm angry because I can't control what happens, I can't reign in the panic or completely predict what will cause it! I'm scared because this could impact my duty beyond repair and yet, hasn't been a problem up until last week! And what you need to understand is that I cannot have this goddamn conversation without repercussions that I'm not prepared to put myself through!"

Yamato threw it all at him. He didn't deserve details, but Obito could be a target for his fury and damn well put up with it if he was going to insist on pushing, even after he'd all but begged him not to.