Board Thread:The Flash discussions/@comment-44904262-20200121144107/@comment-27700324-20200121233824

Because it makes no sense. Yes, it would have worked better for John Wesley Shipp's Flash to hit the Barry from Season 1. However for the other stuff, that timeline is gone. They established that they changed it so Eobard never exists and therefore it's no longer inevitable. It only exists cause Eobard has tied himself to events so much that the Speed Force has to keep that timeline alive just for Nora to die and for everything in the show to happen.