Yeah. It's where the King of Bel, or the Demon Overlord resides. It's like this because some humans might try and use those restoration efforts to try to get in close to try to kill him at the angels behest.

[Even if he'd much prefer it cleaned up and looking less catastrophic. People either revere him, revile him, worship or hate him. He's gotten used to that, and the dead bodies that have accumulated from the angels witting and unwitting pawns alike.]

Not that they could, but the scarier and more deadly it looks, the fewer people will try and be heroes, you know?