Yes its an important point.
So it's not a question of style, it's a matter of fighting experience.
Sorry i disagree with this however. I think there is definately a style element to the equation as well.
There is a tendacy to believe that every martial art is automatically effective, its just up to the practitioner to make it such. But there are things that work in human fighting and things that dont. If a system focuses on more things that dont then it is objectively worse than an art with a focus on those that do.
For instance, you can train Kendo all you want (fighting experience), but will it help you in an unarmed fight or even a fight against most weapons ... probably not. There are plenty of other less obvious examples of this of course.
Regardless, I loved the Aikido Sensei's openness in this video. I notice it didnt seem to diminish his love for his art or get him all depressed. A great sign! Bravo sir!