Yeah. I'm really tired of this "Nolan turned Batman into a realistic action movie" praise you hear everywhere. Sure, the setting has been updated into a more believable context, but that doesn't change that it's still a superhero movie.
Part of this genre is the trope where the hero gets beaten, then has to overcome some sort of crisis and return to save the day. You can clad this narrative in various degrees of realism but the most important aspect of the buildup to the climax is the dramatic aspect, not the demonstration that the hero has had enough training to actually do what he has to do. His resolve to save the day is much more important than his actual ability to do so. Again, from a narrative point of view.
Part of this genre is the trope where the hero gets beaten, then has to overcome some sort of crisis and return to save the day. You can clad this narrative in various degrees of realism but the most important aspect of the buildup to the climax is the dramatic aspect, not the demonstration that the hero has had enough training to actually do what he has to do. His resolve to save the day is much more important than his actual ability to do so. Again, from a narrative point of view.