"That philosophy no doubt works well on the battlefield, or on the streets of many inner cities...
Being aware of your surroundings, cognizant of their dangers (and opportunities), and having options if you need to respond to them isn't limited to combat or back alleys.
...having options if you need to respond to them isn't limited to combat or back alleys.
Are you friendly to no one in your community? Do you have a plan to "kill everyone you meet"? I fully get the part about being "aware of your surroundings, cognizant of their dangers". That's just good sense.