Looks like an interesting book.
Do you mean that the Cabal, or some part of it, has an intention of giving us valuable lessons? Or do you mean that there are valuable lessons that we can take from their materials even though they didn't design them to be positively valuable to us?
More broadly, is it true that there is evil and good in the world? I am not sure. Most of the time, what people consider to be evil is not in fact evil. It is better for correct understanding of the world and effective thinking to try to understand all the things instead of labeling them evil and stopping there.
My own theory about Hollywood is that it is structurally an independent real entertainment industry, but with strong covert influence of the Cabal. Nevertheless the good guys (from the military for example) can exert positive influence on movies and the Marvel movies are examples of it.
It is important to not overestimate the strength of the Cabal and fall into gloom mood thinking they totally control everything. I think it is just not correct.