They don't see "existence" for what it is. They think existence is the content.
Existence is the récipient. What allows you to be real. You have to be real witin something. Within something that create à framework of reality. Within something that allows for things and no things. Up and down.
It's nkt about planèts, galaxies or even dimensions. All these things are simply Within reality.
Reality is the protocole. A dimension is Damus.