"If you're not sure, then there could very well be something that you don't already know."
She was aware that they wouldn't find a better team than Ron and Harry, and reminded herself constantly that they were both capable wizards. But still. "I know all of that," Hermione admitted with a sigh. "But regardless, I would have preferred that the both of you completed the official training before you were pushed into the full Auror positions. You may very well think that what you did during the war was enough, but how do you even know if you're missing something without the chance to find out?"
Her last statement tied into her first. She wasn't trying to be argumentative, but she had her concerns over Ron thinking he already knew everything.