Did you notice that @theilluminated had asked me a direct question that I answered? My last couple of posts were a direct response to that, i.e. nothing to do with you.
In general, in this forum, I have often noticed a kind of "ambivalence" about what GTD is fundamentally all about; I have never quite been able to put my finger on it, but it has always disturbed me because many potentially good and clarifying discussions derail simply because different people seem to imply entirely different kinds of things when they say the three magic letters GTD. I do see the mixing of topics and tacit assumptions as a threat to the quality of any debate.
When you first mentioned the term "self-improvement" I suddenly saw a possibility that maybe precisely this was a common alternative interpretation of GTD that might account for some of the differences in what kind of seemingly uncorrelated conclusions different people arrive at in this and other threads. Apparently this was not so for you, but to some extent for @theilluminated.
@bcmyers, in another thread about GTD, where I argued that GTD is particularly good for people with a fluid or turbulent life situation (I was implicitly comparing with time planning), you countered with something like "No, GTD is all about simplicity, for everybody". May I ask, simple compared with what? And in this thread again, a Lifehack article claims something about simplicity. Simplicity for whom to accomplish what, compared with what?