The author directs you to contemplate the difference between the phrase "not many" -- which was what he wrote -- and "not any" which he assumes you read in a dyslexic fugue state.
Yeah right. Are these just California kids you are referring to? Do you think what you observed is somehow just isolated to California?
One other thing, when I was in the military, some of the wildest, some of the biggest drug users, and little criminals in training were kids of those in the military, "military brats" if you will. No, I didn't spend a day on a base like you, I spent years on bases, on and off posts around military bases, and I saw it close up and personal.
This author seems to assumes a whole lot of things.