Psychologists are saying that you don't get where Arnold is by following the rules. You follow the rules and you're doomed to a mediocre life. Those who reach the top in greatness in politics, business, and other such fields are tied to backstabbing, cheating, lying and alike. Men who also can have a powerful charisma, a show of power and confidence. But rule breakers, put themselves at risk for catastrophic consequences, they don't seem to be aware of or fear.
If we argue that a real man follows a moral code, follows the rules, and a those who break rules are not real men. Than real men are nice guys of mediocrity, who follow rules and play it safe. Men who fear or experience anxiety if they break the slightest rule. If they tell a white lie, there anxiety level soars. Much like a Clark Kent.
Now, Maria was attracted to Arnold. She was taken to his power, confidence and charisma, all the while overlooking what type of personality, a rule breaker. After years of marriage she, as an intelligent women, and the family and background she was from, she had seen clearly who he was and how he got his power. Because Arnold's secret was exposed, Maria had no choice to act, she is a public political figure and her position and power are now compromised by scandal. She is exposed and needs to separate herself from the scandal. She married Arnold as he was, knowing the rewards and consequences of a rule breaker, she is a Kennedy, and knows full well the ways of those who reach great power and great wealth in the upper levels of politics and society.
Arnold a real man, yes. If you define a real man by the cut of his jib. He is true to form. And it is these men we hold in high regard, until they are publicly caught and suffer the consequences. If they avoid the consequences they then held even higher in our eyes. But if they can't, then they are scoundrels.