Banger chapter, as expected of Tsugumomo. Obligatory "I can't believe more people aren't reading this" comment.
It is true though. Most things in life can be solved by staying calm in every possible situation. Also the three-seven rule or whatever, that is just basic human behavior, they just gave it a fancy name. Who the hell always focuses on one thing 100%? Especially in battle, isn't it common sense that you're aware of your surroundings? I'm pretty sure nobody genuinely 100% focuses on a singular thing. Whether we're aware or not, we're most of the time aware of what's happening around us.