Deuce Traveler
Adventurer
Someone said:It´s obviously possible for a powerful individual to teleport into the throne room, kill the guards in twelve seconds, assesinate the royal family, and coerce thr court into obeying him. But we all know what happens then: a baby is miraculously rescued from the castle and given to a peasant family in adoption, and grows into a honorable and healthy, if somewhat naïve, man. He then learns about his past (an event frequently involving an old man, family heirloom or birthmark), learns the arts of war and starts a quest to get his throne back.
So, seizing the throne by force is like putting a death sentence on you, only delayed 18 years. That´s why adventurers stay away from thrones.
So far I like this theory the best.