Question about Archer
So my understanding is that when Archer goes back to kill Shiro, he causes the three routes to happen. And in each route, Shiro still has the chance to become Archer, it is just unlikely. So does that mean, if Archer didn't go back Shiro would absolutely become him or not. Because isn't it like he is going back in time and into another timeline, so that Shiro already might not be destined to become Archer or is every Shiro meant to become Archer and Archer going back changes that by just being there?
So my understanding is that when Archer goes back to kill Shiro, he causes the three routes to happen. And in each route, Shiro still has the chance to become Archer, it is just unlikely. So does that mean, if Archer didn't go back Shiro would absolutely become him or not. Because isn't it like he is going back in time and into another timeline, so that Shiro already might not be destined to become Archer or is every Shiro meant to become Archer and Archer going back changes that by just being there?