I’m not a Star Trek expert, but that is basically how travelling back in time and changing things works in a multiverse without throwing causality out of the window. If the existence of parallel universes is already established and that you can travel to them, why go through the hassle of having to explain a mechanism of how a universe us created by the act of travelling back in time? Where does the energy to create that universe come from?

Other franchises use other time travel mechanisms. Harry Potter And The Prisoner Of Azkaban is one example of how time travel works without parallel universes, while keeping causality and making at least some sense.