It’s easier to move forward than backward.
Try counting forward from one to one hundred, then counting backwards from one hundred to one.
Going backwards slows you down.
Going forward speeds you up.
Going backwards is stale, since you’ve already been there; it’s familiar. One might think the familiarity would speed the process, but it doesn’t.
Going forward is fresh. There are no memories of familiarity to slow you down or make you stumble. It’s an easier ride.