Also, in the books (which I should admit I’ve not read), what exactly were the BG expecting would happen after creating their Quisatz Hadderach? I can’t conceive of how they would hope to retain control or, perhaps rather, how their usual manipulation strategies wouldn’t have blown up in their faces. Would the person they were looking for be so vulnerable in that way? Would they not still have the capacity to retaliate?
They thought their usual mechanisms of control will work, for he was biologically a male and they perfected their art of manipulating and pulling the right strings and offering incentives through their existence.
They thought to have the ideal template, someone that will cover what they can’t do but still be servant to the order, he would act as their agent on the highest order in the establishment. In this scenario he is of a sort an idolization and want of every noble house, provided his ascension is clean and legitimate.
By choosing to attack directly to revolt against something that started long time ago… he shatters their future, it feels less about bringing a future, as much as the denial of a specific one.