I'm not sure I'm reading a huge disagreement here. TBG is arguing, from the outside, that NLP is, more often than not, misused as a means of improving management effectiveness - without reference to the ethics of the business model being pursued.  As such it is wide open to misuse.

You are arguing, from the inside, that whilst NLP can be misused, there is no reason intrinsic to NLP why this should be so, and if it helps some people, what's the problem with using it in an ethical context?

From my brief meeting with you in Paris a couple of years ago, I formed the impression that you were:

1. Charismatic
   
2. Perceptive
   
3. Skilled at understanding human interactions
   
4. Very probably very ethical and well intentioned.

As such I suspect you would be effective using any number of therapies and probably often use other techniques (whether consciously or unconsciously!).

I don't think TBGs remarks should be taken personally, and like any generalisation, should not be taken as always true.  However the general observation he makes, that NLP has gained a reputation for being a useful part of a manager's tool-kit in the context of power or commercial relationships is probably true, even if it is unfair on those ethical practitioners who use it in a genuinely therapeutic context.

Index of Frank's Diaries