1. not semantics this time...it's fundamentals. either you see it or you don't.
2. If I teach you how to throw a frisbee straight ahead, will I also need to teach you how to throw one higher in the air?
3. I just explained this very point to my 12 year old today, so it's still fresh: by saying 'anything works'...it doesn't mean 'everything works'...of course there are good/sucessful and bad/unsucessful techniques. but since the person writing it doesn't know the audience who will be reading, they will just say something to include everyone. Imagine if he wrote 'do it my way, or you'll die trying yours'. lol
It's ok, laugh. my son thinks I'm a nut too.
....but he understood. and he doesn't even do Karate anymore -he got bored. now he and his bro do Aikido and have fun.