“What’s behind you doesn’t matter.” Enzo Ferrari
There is a famous picture of the Olympic gold medalist Michael Phelps, focused on his stroke while the guy in second is looking at him. The champion is not looking back; he is focused on the goal.
The person behind you in the race will either catch you or not. If you take any energy away from giving your absolute best, you increase the probability of losing. All attention is directed towards winning.
Yes, we learn from the past. But the wreck behind you can’t hurt you if you are past it.