I agree. Be familiar with the most common effective options, but don't step into a situation with a complacent, predisposed notion of what should be sufficient to quell your "fight". You could very well find yourself with a shortfall of mental preparedness should greater action be required than you were prepared to take. This will likely lead to taking too little or too great an action. In either case, you've cooked your proverbial goose.
Conversely, if the situation requires less of you, you've probably achieved the best results for your well-being.
As to the OP, the instructor I want is the one who will teach me the techniques, the mindset and the rules of engagement; the book knowledge and the real life applications of all three. To date, I've found that instructor is actually several different instructors.