He's powerfull indeed, but he's just a commoner (that's also the reason why he's just Arch bishop and not a Cardinal). He also needed medicine for his child-
Yeaa and he is strong but not OP... he is only a commoner and merchant, but the person that held his son captive is prince consort, who is just a damn powerful son of a bitch technically. One wrong move and his son is dead.
If he’s THAT powerful, couldnt he save his son on his own? ┑( ̄Д  ̄)┍