Why do ball earthists deny the existence of water mountains?

https://lemmy.sdf.org/post/2043045

Why do ball earthists deny the existence of water mountains? - SDF Chatter

the existence of water mountains implies the existence of forest, fire, shadow and spirit mountains
aren’t the four elements water, fire, earth and air?
Actually they are mountain, island, forest, plains, and swamp
I think this is a Zelda Ocarina of Time reference.