My take is that the Kingdoms in GG are essentially living in a period equivalent to the Cold War.
Queen Orphelith, being the wise and experienced ruler, is doing her best to keep the Nukes (read: Giantesses) from launching.
The fact that each Kingdom possesses these Weapons of Mass Destruction (read: Giantesses) is the only reason that all-out Nuclear War hasn't yet happened.
And she's been doing a balancing act of trying to appease all of the chief Atomic Bombs (read: Giantesses) as best as she can lest they explode in revolt.
By employing a Nuclear Deterrence Strategy, Queen Orphelith has been avoiding/delaying the Nuclear Fallout as much as possible, which would inevitably lead to extremely high tiny casualties, both inside and outside the Kingdoms.