First off: about the Tree of Knowledge.
The purpose of the Tree of Knowledge is to keep you from doing your own assessments, to take ready ideas and swallow them whole. Ultimately the aim of the Tree of Knowledge is to keep you in sheep state.
If you ever visited a mental institution, you have seen the zombie-like patients, that whenever they started to act as people, they were injected with chemicals, to make them comply.
The Tree of Knowledge is the larger than a psychiatric ward solution to the same “problem”. The Tree of Knowledge controls you with words and words that carry emotions.