What is Creon's reason for not wanting to be king?

Whenaccusesof conspiring to depose him and take over the rule of Thebes, Creon explains
that he already gets all the benefits of being king without any of the downsides. Because he is
so close to Oedipus, people fawn over him, wishing him "Godspeed." They try to gain
his favor. He has a voice in policy, in fact, what he calls "boundless influence," but
without any worries. He tells Oedipus:

Why should I leave
the better, choose the worse?
That were sheer madness, and I am not mad.
No
such ambition ever tempted me ...

Creon is saying that he
has no ambitions of becoming ruler. He has everything he wants. This rings true, because when
Laius was killed, Creon could have had the thronein fact, that was what Laius wanted. Instead,
he offered it to anyone who could free Thebes from the Sphinx by solving its riddle. Oedipus did
so, and Creon had him crowned and gave himas his wife. Creon has not shown any resentment of
Oedipus since. It is clear that Oedipus's accusations...