Just an hypothesis in my mind.

[ololololo]

The symbols probably represent silent spiritual concepts or divine forces, which acts as a visual barrier

A rather vague formulation. I can only find something similar in Egyptian hieroglyphs, where gods were depicted.
Voynichese is not like a language where each symbol has its own meaning.

Also, the reason I don't think standard decoding works is because of the alphabet structure. For example, here in the Philippines, our historical script, Baybayin, is an alphasyllabary where a single character can represent a whole syllable or change sounds based on marks.

There’s also Hebrew, where vowels are written using dots next to the symbols. 
You can also read about the connection between Asian languages and Voynichese in the thread of Chinese theory.