I am not convinced that if we reran any part of human history, even WITHOUT anyone consciously trying to interfere, it would turn out the same way, or even remotely similar (and we know for sure that this is the case in the story's multiverse, based on the game's tendency not to follow historical sequences even with no human intervention)
Further, I imagine that a person in a position such as Angelique/Tamara/Mendenhall, with the ear of the monarch of one of the most powerful states in the region and eventually the world, would have a much better chance to alter history than an ortinary person.