I am not here to promote my book. The forum people chose it on their own, as have many thousands of people over the past 17 years. They've bought it already, I have no need to sell it to them again.
Try this: One measure of Dm7 moving to G7... play D-G#-A-F# to G. Now play D-G#-A-F to G. Personally, I think the first way sounds smoother as a line, and the fact that the "offending note" happens on beat 4 renders it essentially harmless to the chord quality which immediately passes to the G7. If the F# bugs you - don't use it.
I'm glad you feel well qualified to teach and you are free to criticize whatever you want about my methods. I am not so insecure about my work that I can't take some questioning.
However, I will say this once more and leave it at that: Using a chromatic approach from a minor chord that is the major 3rd is perfectly acceptable for anyone - Ron Carter, a beginner, my aunt Gertrude... anyone. If it sounds good for Ron Carter, it will sound good for my aunt as well, though I think she swings a little harder.
You can't subscribe to this advice without warnings or alternate solutions... what type of warning exactly? No one has lost a gig, been humiliated in public or suffered bodily harm as a result of using this musical technique.
Alternate solutions? The entire book is full of them. So it seems to me you are simply pushing a point for the sake of something else. Ultimately, one note here or there does not make or break a walking bass line, but regardless, I still think it sounds better.
If you assume that I tell people this out of a lack of professional consciousness, you are being more than a bit presumptuous.
Now, can we move on from this time consuming nit-picking?