I agree with others that have said natural horsemanship is about using the horses own language, you act like the alpha mare to gain the horses respect and trust. I like the methods but do not subscribe to any particular trainer, I prefer to read and watch many trainers and take what I can from each, and that goes for all trainers, not just NH ones. I think the ideas behind NH are very valid but marketing has taken over. NH is not a miracle cure, and it is not exclusive. I use a mixture of NH and other techniques when training my horse. I personally dislike when people think NH and dressage can't mix, it does for me!!
As for the over priced gear, that happens in all realms of the horse world, I certainly wouldn't pay $4500 for an Anky Salinero saddle but many would!!