Yes, I can see how that might happen ...
Al Brooks isn't easy. I see many comments, from many people, in many forums, about the difficulties of applying his teaching.
At the same time, from my own earning-a-living perspective, he's probably the second most important and helpful author whose work I've ever looked at.
So there's a kind of "glaring discrepancy" there, for me, with the good Dr. Brooks, between my own experience and the comments I see made by other people.
It continues to puzzles me slightly, and I do think about it, quite a bit, and discuss it with one friend who's in exactly the same position as me, with this issue.
I attribute it largely to a mixture of the following factors, in some (unknown and perhaps variable) proportions ...
(i) Al Brooks' books are undeniably badly edited and their contents (outstanding material though it is) are not always presented in the most convenient arrangements and with the most convenient structure for the reader;
(ii) Although - as he rightly says himself - all the material is applicable to forex, paying the kind of spreads that counterparty market-maker "brokers" charge is certainly imposing an additional handicap (I had no problems at Interactive Brokers, paying a commission-per-trade instead of spread);
(iii) People quite often don't appreciate that these aren't really "scalping techniques", per se, and it's equally possible to trade them from slower-moving charts, with which the dealing-costs aren't nearly so significant a factor;
(iv) The books are "heavy going" and most people need to read them all at least two or three times to get everything out of them (I think they give many people that "Very good, Mozart, but too many notes" feeling! );
(v) He doesn't provide "a complete trading system" to copy, which many people want in preference to "education";
I do, however, feel strongly that his books are very much The Real Thing - and I'm not even sure I'd be making a living at all, without them.