Originally Posted by
BlacKnight
If Daenerys was so afraid of Jon she could have just killed him.
Or even better married him. Why nobody in the series has talked about a marriage between the two is beyond me.
People take the famous quote "Power resides where men think it resides" in the wrong way. It doesn't mean that you can ignore law and tradition. On the opposite it means that those, while can be manipulated, are supremely important.
The Baratheon legitimacy tracked back on the Targaryens. Every claimant to the IT in the war of the five kings caimed to be successor of Robert. Sure Renly was second in line but still second, not a nobody.
Having many people following the laws of succession is kind of necessary for having a monarchy. If Westeros was total anarchy where nobody cared about legitimacy the Targaryens wouldn't have ruled for more than a century without dragons.
Of course by show logic everything is possible, even Bran as king.