Answer: Kabbalists write about the part we can attain.
We can only attain whatever concerns us. Everything that does not concern us, we do not know and cannot even imagine.
Kabbalah talks about what is perceived inside the desire to receive, created by the Creator. If the desire cannot define something, it is impossible to describe. Kabbalah is a purely experimental science.
From the Kabbalah lesson in Russian 1/21/18