Why was the Dungeon of Dorukan so easy?

[mjasghar]

I’m referring to the quote about moving the Gates to the outer planes to kill the gods
It’s something like “it’s a connection to the prison plane. When you move it you connect the prison plane to one of the outer planes and the Snarl moves there and kills the gods in that plane. But then the evil gods will spam portals from that plane to the Dark Ones plane.”
In fact your quote also has that concept. He literally calls it a doorway - NOT a patch or anything that suggests they are sealing off the path. Yes the word seal is used but at the same time so is door and doorway. So to me that suggests they were making a door to that other world whilst stopping the Snarl using it. Sort of like those Perspex tunnels you get in sea life centres that you can walk through the bottom of the main tank.