True, but in my opinion, and I am no theologian, that deceit regarding a serious character defect which will hamper the marriage, are two errors about the quality of the person which amounts to errors of the person.
You can't hide something as fundamental as a choleric temperament or a tendency to lose one's temper. If the woman is not blind, she will see that her husband is prone to anger, control, even violence when provoked. It's like saying a man could hide being a man, pretending he was a female. No, everything about him would betray him. His stride, his bearing, his posture, everything would betray "I'm a man".
Love is notoriously blind, but it can't be cited later as grounds for annulment. What did the woman think? The way he treated that waiter at the restaurant last week is how he's going to treat YOU in 10 years. No he wasn't just "having a bad day". Women are notorious for making excuses for stuff like this, especially when infatuation/love/emotions are involved.
Oh, and you should court your prospective spouse longer than a few weeks, or a few months, especially if you have any doubts. Even an alcoholic can stay clean for a week or two...
There is nothing so tragic as the man (or woman) who deceives HIMSELF.