Why is NLP such a popular topic within the personal development Industry?

So when you take an NLP training, the training should focus on how you go about experimenting with the mind, not showing you xyz techniques. For instance, we all have what’s called an internal world, mostly made of sounds, feelings and pictures (plus self talk). We call that the VAKOG for short (Visual, audio, kinesthetic and to a lesser extent, olfactory and gustatory). This inner world informs you and I what is good bad, valuable, or avoidable. It’s in the form of coding and very unconscious.