1) Watch me leave the game immediately
2) Would not accomplish the goal anyways.
This isn't about our character's power level at all. This is about presenting the player with one doomsday scenario after another. It just doesn't work. Players will get numb to it and it will lose it's impact. World of Warcraft had the same problem, really. By the time Legion rolled around, dealing with them as a world-ending threat was just another day at the office.
BTW: just because our character managed to defeat demigods with a lot of help, doesn't mean that more earthly threats are no longer dangerous to us. A bunch of Pirates could still disarm and kill my kitten. She is not invincible and frankly put: Hydaelin's blessing would do diddly squat in that situation.